text:
Charles Babbage

Charles Babbage (26 December 1791 – 18 October 1871) was an English polymath. A mathematician, philosopher, inventor and mechanical engineer, Babbage originated the concept of a digital programmable computer.

Babbage is considered by some to be "father of the computer". He is credited with inventing the first mechanical computer, the Difference Engine, that eventually led to more complex electronic designs, though all the essential ideas of modern computers are to be found in his Analytical Engine, programmed using a principle openly borrowed from the Jacquard loom. Babbage had a broad range of interests in addition to his work on computers covered in his 1832 book Economy of Manufactures and Machinery. He was an important figure in the social scene in London, and is credited with importing the "scientific soirée" from France with his well-attended Saturday evening soirées. His varied work in other fields has led him to be described as "pre-eminent" among the many polymaths of his century.

Babbage, who died before the complete successful engineering of many of his designs, including his Difference Engine and Analytical Engine, remained a prominent figure in the ideating of computing. Parts of his incomplete mechanisms are on display in the Science Museum in London. In 1991, a functioning difference engine was constructed from the original plans. Built to tolerances achievable in the 19th century, the success of the finished engine indicated that Babbage's machine would have worked.

Early life
Babbage's birthplace is disputed, but according to the Oxford Dictionary of National Biography he was most likely born at 44 Crosby Row, Walworth Road, London, England. A blue plaque on the junction of Larcom Street and Walworth Road commemorates the event.

His date of birth was given in his obituary in The Times as 26 December 1792; but then a nephew wrote to say that Babbage was born one year earlier, in 1791. The parish register of St. Mary's, Newington, London, shows that Babbage was baptised on 6 January 1792, supporting a birth year of 1791.

Babbage was one of four children of Benjamin Babbage and Betsy Plumleigh Teape. His father was a banking partner of William Praed in founding Praed's & Co. of Fleet Street, London, in 1801. In 1808, the Babbage family moved into the old Rowdens house in East Teignmouth. Around the age of eight, Babbage was sent to a country school in Alphington near Exeter to recover from a life-threatening fever. For a short time, he attended King Edward VI Grammar School in Totnes, South Devon, but his health forced him back to private tutors for a time.

Babbage then joined the 30-student Holmwood Academy, in Baker Street, Enfield, Middlesex, under the Reverend Stephen Freeman. The academy had a library that prompted Babbage's love of mathematics. He studied with two more private tutors after leaving the academy. The first was a clergyman near Cambridge; through him Babbage encountered Charles Simeon and his evangelical followers, but the tuition was not what he needed. He was brought home, to study at the Totnes school: this was at age 16 or 17. The second was an Oxford tutor, under whom Babbage reached a level in Classics sufficient to be accepted by the University of Cambridge.

At the University of Cambridge
Babbage arrived at Trinity College, Cambridge, in October 1810. He was already self-taught in some parts of contemporary mathematics; he had read Robert Woodhouse, Joseph Louis Lagrange, and Marie Agnesi. As a result, he was disappointed in the standard mathematical instruction available at the university.

Babbage, John Herschel, George Peacock, and several other friends formed the Analytical Society in 1812; they were also close to Edward Ryan. As a student, Babbage was also a member of other societies such as The Ghost Club, concerned with investigating supernatural phenomena, and the Extractors Club, dedicated to liberating its members from the madhouse, should any be committed to one.

In 1812, Babbage transferred to Peterhouse, Cambridge. He was the top mathematician there, but did not graduate with honours. He instead received a degree without examination in 1814. He had defended a thesis that was considered blasphemous in the preliminary public disputation, but it is not known whether this fact is related to his not sitting the examination.

After Cambridge
Considering his reputation, Babbage quickly made progress. He lectured to the Royal Institution on astronomy in 1815, and was elected a Fellow of the Royal Society in 1816. After graduation, on the other hand, he applied for positions unsuccessfully, and had little in the way of a career. In 1816 he was a candidate for a teaching job at Haileybury College; he had recommendations from James Ivory and John Playfair, but lost out to Henry Walter. In 1819, Babbage and Herschel visited Paris and the Society of Arcueil, meeting leading French mathematicians and physicists. That year Babbage applied to be professor at the University of Edinburgh, with the recommendation of Pierre Simon Laplace; the post went to William Wallace.

With Herschel, Babbage worked on the electrodynamics of Arago's rotations, publishing in 1825. Their explanations were only transitional, being picked up and broadened by Michael Faraday. The phenomena are now part of the theory of eddy currents, and Babbage and Herschel missed some of the clues to unification of electromagnetic theory, staying close to Ampère's force law.

Babbage purchased the actuarial tables of George Barrett, who died in 1821 leaving unpublished work, and surveyed the field in 1826 in Comparative View of the Various Institutions for the Assurance of Lives. This interest followed a project to set up an insurance company, prompted by Francis Baily and mooted in 1824, but not carried out. Babbage did calculate actuarial tables for that scheme, using Equitable Society mortality data from 1762 onwards.

During this whole period, Babbage depended awkwardly on his father's support, given his father's attitude to his early marriage, of 1814: he and Edward Ryan wedded the Whitmore sisters. He made a home in Marylebone in London and established a large family. On his father's death in 1827, Babbage inherited a large estate (value around £100,000, equivalent to £ or $ today), making him independently wealthy. After his wife's death in the same year he spent time travelling. In Italy he met Leopold II, Grand Duke of Tuscany, foreshadowing a later visit to Piedmont. In April 1828 he was in Rome, and relying on Herschel to manage the difference engine project, when he heard that he had become a professor at Cambridge, a position he had three times failed to obtain (in 1820, 1823 and 1826).

Royal Astronomical Society
Babbage was instrumental in founding the Royal Astronomical Society in 1820, initially known as the Astronomical Society of London. Its original aims were to reduce astronomical calculations to a more standard form, and to circulate data. These directions were closely connected with Babbage's ideas on computation, and in 1824 he won its Gold Medal, cited "for his invention of an engine for calculating mathematical and astronomical tables".

Babbage's motivation to overcome errors in tables by mechanisation had been a commonplace since Dionysius Lardner wrote about it in 1834 in the Edinburgh Review (under Babbage's guidance). The context of these developments is still debated. Babbage's own account of the origin of the difference engine begins with the Astronomical Society's wish to improve The Nautical Almanac. Babbage and Herschel were asked to oversee a trial project, to recalculate some part of those tables. With the results to hand, discrepancies were found. This was in 1821 or 1822, and was the occasion on which Babbage formulated his idea for mechanical computation. The issue of the Nautical Almanac is now described as a legacy of a polarisation in British science caused by attitudes to Sir Joseph Banks, who had died in 1820. Babbage studied the requirements to establish a modern postal system, with his friend Thomas Frederick Colby, concluding there should be a uniform rate that was put into effect with the introduction of the Uniform Fourpenny Post supplanted by the Uniform Penny Post in 1839 and 1840. Colby was another of the founding group of the Society. He was also in charge of the Survey of Ireland. Herschel and Babbage were present at a celebrated operation of that survey, the remeasuring of the Lough Foyle baseline.

British Lagrangian School
The Analytical Society had initially been no more than an undergraduate provocation. During this period it had some more substantial achievements. In 1816 Babbage, Herschel and Peacock published a translation from French of the lectures of Sylvestre Lacroix, which was then the state-of-the-art calculus textbook.

Reference to Lagrange in calculus terms marks out the application of what are now called formal power series. British mathematicians had used them from about 1730 to 1760. As re-introduced, they were not simply applied as notations in differential calculus. They opened up the fields of functional equations (including the difference equations fundamental to the difference engine) and operator (D-module) methods for differential equations. The analogy of difference and differential equations was notationally changing Δ to D, as a "finite" difference becomes "infinitesimal". These symbolic directions became popular, as operational calculus, and pushed to the point of diminishing returns. The Cauchy concept of limit was kept at bay. Woodhouse had already founded this second "British Lagrangian School" with its treatment of Taylor series as formal.

In this context function composition is complicated to express, because the chain rule is not simply applied to second and higher derivatives. This matter was known to Woodhouse by 1803, who took from Louis François Antoine Arbogast what is now called Faà di Bruno's formula. In essence it was known to Abraham De Moivre (1697). Herschel found the method impressive, Babbage knew of it, and it was later noted by Ada Lovelace as compatible with the analytical engine. In the period to 1820 Babbage worked intensively on functional equations in general, and resisted both conventional finite differences and Arbogast's approach (in which Δ and D were related by the simple additive case of the exponential map). But via Herschel he was influenced by Arbogast's ideas in the matter of iteration, i.e. composing a function with itself, possibly many times. Writing in a major paper on functional equations in the Philosophical Transactions (1815/6), Babbage said his starting point was work of Gaspard Monge.

Academic
From 1828 to 1839, Babbage was Lucasian Professor of Mathematics at Cambridge. Not a conventional resident don, and inattentive to his teaching responsibilities, he wrote three topical books during this period of his life. He was elected a Foreign Honorary Member of the American Academy of Arts and Sciences in 1832. Babbage was out of sympathy with colleagues: George Biddell Airy, his predecessor as Lucasian Professor of Mathematics at Trinity College, Cambridge, thought an issue should be made of his lack of interest in lecturing. Babbage planned to lecture in 1831 on political economy. Babbage's reforming direction looked to see university education more inclusive, universities doing more for research, a broader syllabus and more interest in applications; but William Whewell found the programme unacceptable. A controversy Babbage had with Richard Jones lasted for six years. He never did give a lecture.

It was during this period that Babbage tried to enter politics. Simon Schaffer writes that his views of the 1830s included disestablishment of the Church of England, a broader political franchise, and inclusion of manufacturers as stakeholders. He twice stood for Parliament as a candidate for the borough of Finsbury. In 1832 he came in third among five candidates, missing out by some 500 votes in the two-member constituency when two other reformist candidates, Thomas Wakley and Christopher Temple, split the vote. In his memoirs Babbage related how this election brought him the friendship of Samuel Rogers: his brother Henry Rogers wished to support Babbage again, but died within days. In 1834 Babbage finished last among four. In 1832, Babbage, Herschel and Ivory were appointed Knights of the Royal Guelphic Order, however they were not subsequently made knights bachelor to entitle them to the prefix Sir, which often came with appointments to that foreign order (though Herschel was later created a baronet).

"Declinarians", learned societies and the BAAS
Babbage now emerged as a polemicist. One of his biographers notes that all his books contain a "campaigning element". His Reflections on the Decline of Science and some of its Causes (1830) stands out, however, for its sharp attacks. It aimed to improve British science, and more particularly to oust Davies Gilbert as President of the Royal Society, which Babbage wished to reform. It was written out of pique, when Babbage hoped to become the junior secretary of the Royal Society, as Herschel was the senior, but failed because of his antagonism to Humphry Davy. Michael Faraday had a reply written, by Gerrit Moll, as On the Alleged Decline of Science in England (1831). On the front of the Royal Society Babbage had no impact, with the bland election of the Duke of Sussex to succeed Gilbert the same year. As a broad manifesto, on the other hand, his Decline led promptly to the formation in 1831 of the British Association for the Advancement of Science (BAAS).

The Mechanics' Magazine in 1831 identified as Declinarians the followers of Babbage. In an unsympathetic tone it pointed out David Brewster writing in the Quarterly Review as another leader; with the barb that both Babbage and Brewster had received public money.

In the debate of the period on statistics (qua data collection) and what is now statistical inference, the BAAS in its Statistical Section (which owed something also to Whewell) opted for data collection. This Section was the sixth, established in 1833 with Babbage as chairman and John Elliot Drinkwater as secretary. The foundation of the Statistical Society followed. Babbage was its public face, backed by Richard Jones and Robert Malthus.

On the Economy of Machinery and Manufactures
Babbage published On the Economy of Machinery and Manufactures (1832), on the organisation of industrial production. It was an influential early work of operational research. John Rennie the Younger in addressing the Institution of Civil Engineers on manufacturing in 1846 mentioned mostly surveys in encyclopaedias, and Babbage's book was first an article in the Encyclopædia Metropolitana, the form in which Rennie noted it, in the company of related works by John Farey Jr., Peter Barlow and Andrew Ure. From An essay on the general principles which regulate the application of machinery to manufactures and the mechanical arts (1827), which became the Encyclopædia Metropolitana article of 1829, Babbage developed the schematic classification of machines that, combined with discussion of factories, made up the first part of the book. The second part considered the "domestic and political economy" of manufactures.

The book sold well, and quickly went to a fourth edition (1836). Babbage represented his work as largely a result of actual observations in factories, British and abroad. It was not, in its first edition, intended to address deeper questions of political economy; the second (late 1832) did, with three further chapters including one on piece rate. The book also contained ideas on rational design in factories, and profit sharing.

"Babbage principle"
In Economy of Machinery was described what is now called the "Babbage principle". It pointed out commercial advantages available with more careful division of labour. As Babbage himself noted, it had already appeared in the work of Melchiorre Gioia in 1815. The term was introduced in 1974 by Harry Braverman. Related formulations are the "principle of multiples" of Philip Sargant Florence, and the "balance of processes".

What Babbage remarked is that skilled workers typically spend parts of their time performing tasks that are below their skill level. If the labour process can be divided among several workers, labour costs may be cut by assigning only high-skill tasks to high-cost workers, restricting other tasks to lower-paid workers. He also pointed out that training or apprenticeship can be taken as fixed costs; but that returns to scale are available by his approach of standardisation of tasks, therefore again favouring the factory system. His view of human capital was restricted to minimising the time period for recovery of training costs.

Publishing
Another aspect of the work was its detailed breakdown of the cost structure of book publishing. Babbage took the unpopular line, from the publishers' perspective, of exposing the trade's profitability. He went as far as to name the organisers of the trade's restrictive practices. Twenty years later he attended a meeting hosted by John Chapman to campaign against the Booksellers Association, still a cartel.

Influence
It has been written that "what Arthur Young was to agriculture, Charles Babbage was to the factory visit and machinery". Babbage's theories are said to have influenced the layout of the 1851 Great Exhibition, and his views had a strong effect on his contemporary George Julius Poulett Scrope. Karl Marx argued that the source of the productivity of the factory system was exactly the combination of the division of labour with machinery, building on Adam Smith, Babbage and Ure. Where Marx picked up on Babbage and disagreed with Smith was on the motivation for division of labour by the manufacturer: as Babbage did, he wrote that it was for the sake of profitability, rather than productivity, and identified an impact on the concept of a trade.

John Ruskin went further, to oppose completely what manufacturing in Babbage's sense stood for. Babbage also affected the economic thinking of John Stuart Mill. George Holyoake saw Babbage's detailed discussion of profit sharing as substantive, in the tradition of Robert Owen and Charles Fourier, if requiring the attentions of a benevolent captain of industry, and ignored at the time.

Charles Babbage's Saturday night soirées, held from 1828 into the 1840s, were important gathering places for prominent scientists, authors and aristocracy. Babbage is credited with importing the "scientific soirée" from France with his well-attended Saturday evening soirées.

Works by Babbage and Ure were published in French translation in 1830; On the Economy of Machinery was translated in 1833 into French by Édouard Biot, and into German the same year by Gottfried Friedenberg. The French engineer and writer on industrial organisation Léon Lalanne was influenced by Babbage, but also by the economist Claude Lucien Bergery, in reducing the issues to "technology". William Jevons connected Babbage's "economy of labour" with his own labour experiments of 1870. The Babbage principle is an inherent assumption in Frederick Winslow Taylor's scientific management.

Mary Everest Boole claimed that there was profound influence – via her uncle George Everest – of Indian thought in general and Indian logic, in particular, on Babbage and on her husband George Boole, as well as on Augustus De Morgan:

"Think what must have been the effect of the intense Hinduizing of three such men as Babbage, De Morgan, and George Boole on the mathematical atmosphere of 1830–65. What share had it in generating the Vector Analysis and the mathematics by which investigations in physical science are now conducted?"

Natural theology
In 1837, responding to the series of eight Bridgewater Treatises, Babbage published his Ninth Bridgewater Treatise, under the title On the Power, Wisdom and Goodness of God, as manifested in the Creation. In this work Babbage weighed in on the side of uniformitarianism in a current debate. He preferred the conception of creation in which a God-given natural law dominated, removing the need for continuous "contrivance".

The book is a work of natural theology, and incorporates extracts from related correspondence of Herschel with Charles Lyell. Babbage put forward the thesis that God had the omnipotence and foresight to create as a divine legislator. In this book, Babbage dealt with relating interpretations between science and religion; on the one hand, he insisted that "there exists no fatal collision between the words of Scripture and the facts of nature;" on the other hand, he wrote that the Book of Genesis was not meant to be read literally in relation to scientific terms. Against those who said these were in conflict, he wrote "that the contradiction they have imagined can have no real existence, and that whilst the testimony of Moses remains unimpeached, we may also be permitted to confide in the testimony of our senses."

The Ninth Bridgewater Treatise was quoted extensively in Vestiges of the Natural History of Creation. The parallel with Babbage's computing machines is made explicit, as allowing plausibility to the theory that transmutation of species could be pre-programmed.

Jonar Ganeri, author of Indian Logic, believes Babbage may have been influenced by Indian thought; one possible route would be through Henry Thomas Colebrooke. Mary Everest Boole argues that Babbage was introduced to Indian thought in the 1820s by her uncle George Everest: "Some time about 1825, [Everest] came to England for two or three years, and made a fast and lifelong friendship with Herschel and with Babbage, who was then quite young. I would ask any fair-minded mathematician to read Babbage's Ninth Bridgewater Treatise and compare it with the works of his contemporaries in England; and then ask himself whence came the peculiar conception of the nature of miracle which underlies Babbage's ideas of Singular Points on Curves (Chap, viii) – from European Theology or Hindu Metaphysic? Oh! how the English clergy of that day hated Babbage's book!"

Religious views
Babbage was raised in the Protestant form of the Christian faith, his family having inculcated in him an orthodox form of worship. He explained:

"My excellent mother taught me the usual forms of my daily and nightly prayer; and neither in my father nor my mother was there any mixture of bigotry and intolerance on the one hand, nor on the other of that unbecoming and familiar mode of addressing the Almighty which afterwards so much disgusted me in my youthful years."

Rejecting the Athanasian Creed as a "direct contradiction in terms", in his youth he looked to Samuel Clarke's works on religion, of which Being and Attributes of God (1704) exerted a particularly strong influence on him. Later in life, Babbage concluded that "the true value of the Christian religion rested, not on speculative [theology] ... but ... upon those doctrines of kindness and benevolence which that religion claims and enforces, not merely in favour of man himself but of every creature susceptible of pain or of happiness."

In his autobiography Passages from the Life of a Philosopher (1864), Babbage wrote a whole chapter on the topic of religion, where he identified three sources of divine knowledge: He stated, on the basis of the design argument, that studying the works of nature had been the more appealing evidence, and the one which led him to actively profess the existence of God. Advocating for natural theology, he wrote: "In the works of the Creator ever open to our examination, we possess a firm basis on which to raise the superstructure of an enlightened creed. The more man inquires into the laws which regulate the material universe, the more he is convinced that all its varied forms arise from the action of a few simple principles ... The works of the Creator, ever present to our senses, give a living and perpetual testimony of his power and goodness far surpassing any evidence transmitted through human testimony. The testimony of man becomes fainter at every stage of transmission, whilst each new inquiry into the works of the Almighty gives to us more exalted views of his wisdom, his goodness, and his power."
 * 1) A priori or mystical experience
 * 2) From Revelation
 * 3) From the examination of the works of the Creator

Like Samuel Vince, Babbage also wrote a defence of the belief in divine miracles. Against objections previously posed by David Hume, Babbage advocated for the belief of divine agency, stating "we must not measure the credibility or incredibility of an event by the narrow sphere of our own experience, nor forget that there is a Divine energy which overrides what we familiarly call the laws of nature." He alluded to the limits of human experience, expressing: "all that we see in a miracle is an effect which is new to our observation, and whose cause is concealed. The cause may be beyond the sphere of our observation, and would be thus beyond the familiar sphere of nature; but this does not make the event a violation of any law of nature. The limits of man's observation lie within very narrow boundaries, and it would be arrogance to suppose that the reach of man's power is to form the limits of the natural world."

Later life
The British Association was consciously modelled on the Deutsche Naturforscher-Versammlung, founded in 1822. It rejected romantic science as well as metaphysics, and started to entrench the divisions of science from literature, and professionals from amateurs. Belonging as he did to the "Wattite" faction in the BAAS, represented in particular by James Watt the younger, Babbage identified closely with industrialists. He wanted to go faster in the same directions, and had little time for the more gentlemanly component of its membership. Indeed, he subscribed to a version of conjectural history that placed industrial society as the culmination of human development (and shared this view with Herschel). A clash with Roderick Murchison led in 1838 to his withdrawal from further involvement. At the end of the same year he sent in his resignation as Lucasian professor, walking away also from the Cambridge struggle with Whewell. His interests became more focussed, on computation and metrology, and on international contacts.

Metrology programme
A project announced by Babbage was to tabulate all physical constants (referred to as "constants of nature", a phrase in itself a neologism), and then to compile an encyclopaedic work of numerical information. He was a pioneer in the field of "absolute measurement". His ideas followed on from those of Johann Christian Poggendorff, and were mentioned to Brewster in 1832. There were to be 19 categories of constants, and Ian Hacking sees these as reflecting in part Babbage's "eccentric enthusiasms". Babbage's paper On Tables of the Constants of Nature and Art was reprinted by the Smithsonian Institution in 1856, with an added note that the physical tables of Arnold Henry Guyot "will form a part of the important work proposed in this article".

Exact measurement was also key to the development of machine tools. Here again Babbage is considered a pioneer, with Henry Maudslay, William Sellers, and Joseph Whitworth.

Engineer and inventor
Through the Royal Society Babbage acquired the friendship of the engineer Marc Brunel. It was through Brunel that Babbage knew of Joseph Clement, and so came to encounter the artisans whom he observed in his work on manufactures. Babbage provided an introduction for Isambard Kingdom Brunel in 1830, for a contact with the proposed Bristol & Birmingham Railway. He carried out studies, around 1838, to show the superiority of the broad gauge for railways, used by Brunel's Great Western Railway.

In 1838, Babbage invented the pilot (also called a cow-catcher), the metal frame attached to the front of locomotives that clears the tracks of obstacles; he also constructed a dynamometer car. His eldest son, Benjamin Herschel Babbage, worked as an engineer for Brunel on the railways before emigrating to Australia in the 1850s.

Babbage also invented an ophthalmoscope, which he gave to Thomas Wharton Jones for testing. Jones, however, ignored it. The device only came into use after being independently invented by Hermann von Helmholtz.

Cryptography
Babbage achieved notable results in cryptography, though this was still not known a century after his death. Letter frequency was category 18 of Babbage's tabulation project. Joseph Henry later defended interest in it, in the absence of the facts, as relevant to the management of movable type.

As early as 1845, Babbage had solved a cipher that had been posed as a challenge by his nephew Henry Hollier, and in the process, he made a discovery about ciphers that were based on Vigenère tables. Specifically, he realised that enciphering plain text with a keyword rendered the cipher text subject to modular arithmetic. During the Crimean War of the 1850s, Babbage broke Vigenère's autokey cipher as well as the much weaker cipher that is called Vigenère cipher today. His discovery was kept a military secret, and was not published. Credit for the result was instead given to Friedrich Kasiski, a Prussian infantry officer, who made the same discovery some years later. However, in 1854, Babbage published the solution of a Vigenère cipher, which had been published previously in the Journal of the Society of Arts. In 1855, Babbage also published a short letter, "Cypher Writing", in the same journal. Nevertheless, his priority was not established until 1985.

Public nuisances
Babbage involved himself in well-publicised but unpopular campaigns against public nuisances. He once counted all the broken panes of glass of a factory, publishing in 1857 a "Table of the Relative Frequency of the Causes of Breakage of Plate Glass Windows": Of 464 broken panes, 14 were caused by "drunken men, women or boys".

Babbage's distaste for commoners (the Mob) included writing "Observations of Street Nuisances" in 1864, as well as tallying up 165 "nuisances" over a period of 80 days. He especially hated street music, and in particular the music of organ grinders, against whom he railed in various venues. The following quotation is typical:

"It is difficult to estimate the misery inflicted upon thousands of persons, and the absolute pecuniary penalty imposed upon multitudes of intellectual workers by the loss of their time, destroyed by organ-grinders and other similar nuisances."

Babbage was not alone in his campaign. A convert to the cause was the MP Michael Thomas Bass.

In the 1860s, Babbage also took up the anti-hoop-rolling campaign. He blamed hoop-rolling boys for driving their iron hoops under horses' legs, with the result that the rider is thrown and very often the horse breaks a leg. Babbage achieved a certain notoriety in this matter, being denounced in debate in Commons in 1864 for "commencing a crusade against the popular game of tip-cat and the trundling of hoops."

Computing pioneer

Babbage's machines were among the first mechanical computers. That they were not actually completed was largely because of funding problems and clashes of personality, most notably with George Biddell Airy, the Astronomer Royal.

Babbage directed the building of some steam-powered machines that achieved some modest success, suggesting that calculations could be mechanised. For more than ten years he received government funding for his project, which amounted to £17,000, but eventually the Treasury lost confidence in him.

While Babbage's machines were mechanical and unwieldy, their basic architecture was similar to that of a modern computer. The data and program memory were separated, operation was instruction-based, the control unit could make conditional jumps, and the machine had a separate I/O unit.

Background on mathematical tables
In Babbage's time, printed mathematical tables were calculated by human computers; in other words, by hand. They were central to navigation, science and engineering, as well as mathematics. Mistakes were known to occur in transcription as well as calculation.

At Cambridge, Babbage saw the fallibility of this process, and the opportunity of adding mechanisation into its management. His own account of his path towards mechanical computation references a particular occasion: "In 1812 he was sitting in his rooms in the Analytical Society looking at a table of logarithms, which he knew to be full of mistakes, when the idea occurred to him of computing all tabular functions by machinery. The French government had produced several tables by a new method. Three or four of their mathematicians decided how to compute the tables, half a dozen more broke down the operations into simple stages, and the work itself, which was restricted to addition and subtraction, was done by eighty computers who knew only these two arithmetical processes. Here, for the first time, mass production was applied to arithmetic, and Babbage was seized by the idea that the labours of the unskilled computers [people] could be taken over completely by machinery which would be quicker and more reliable."

There was another period, seven years later, when his interest was aroused by the issues around computation of mathematical tables. The French official initiative by Gaspard de Prony, and its problems of implementation, were familiar to him. After the Napoleonic Wars came to a close, scientific contacts were renewed on the level of personal contact: in 1819 Charles Blagden was in Paris looking into the printing of the stalled de Prony project, and lobbying for the support of the Royal Society. In works of the 1820s and 1830s, Babbage referred in detail to de Prony's project.

Difference engine

Babbage began in 1822 with what he called the difference engine, made to compute values of polynomial functions. It was created to calculate a series of values automatically. By using the method of finite differences, it was possible to avoid the need for multiplication and division.

For a prototype difference engine, Babbage brought in Joseph Clement to implement the design, in 1823. Clement worked to high standards, but his machine tools were particularly elaborate. Under the standard terms of business of the time, he could charge for their construction, and would also own them. He and Babbage fell out over costs around 1831.

Some parts of the prototype survive in the Museum of the History of Science, Oxford. This prototype evolved into the "first difference engine". It remained unfinished and the finished portion is located at the Science Museum in London. This first difference engine would have been composed of around 25,000 parts, weighed 15 short ton, and would have been 8 ft tall. Although Babbage received ample funding for the project, it was never completed. He later (1847–1849) produced detailed drawings for an improved version,"Difference Engine No. 2", but did not receive funding from the British government. His design was finally constructed in 1989–1991, using his plans and 19th-century manufacturing tolerances. It performed its first calculation at the Science Museum, London, returning results to 31 digits.

Nine years later, in 2000, the Science Museum completed the printer Babbage had designed for the difference engine.

Completed models
The Science Museum has constructed two Difference Engines according to Babbage's plans for the Difference Engine No 2. One is owned by the museum. The other, owned by the technology multimillionaire Nathan Myhrvold, went on exhibition at the Computer History Museum in Mountain View, California on 10 May 2008. The two models that have been constructed are not replicas.

Analytical Engine
After the attempt at making the first difference engine fell through, Babbage worked to design a more complex machine called the Analytical Engine. He hired C. G. Jarvis, who had previously worked for Clement as a draughtsman. The Analytical Engine marks the transition from mechanised arithmetic to fully-fledged general purpose computation. It is largely on it that Babbage's standing as computer pioneer rests.

The major innovation was that the Analytical Engine was to be programmed using punched cards: the Engine was intended to use loops of Jacquard's punched cards to control a mechanical calculator, which could use as input the results of preceding computations. The machine was also intended to employ several features subsequently used in modern computers, including sequential control, branching and looping. It would have been the first mechanical device to be, in principle, Turing-complete. Charles Babbage wrote a series of programs for the Analytical Engine from 1837 to 1840. The first program was finished in 1837. The Engine was not a single physical machine, but rather a succession of designs that Babbage tinkered with until his death in 1871.

Ada Lovelace and Italian followers
Ada Lovelace, who corresponded with Babbage during his development of the Analytical Engine, is credited with developing an algorithm that would enable the Engine to calculate a sequence of Bernoulli numbers. Despite documentary evidence in Lovelace's own handwriting, some scholars dispute to what extent the ideas were Lovelace's own. For this achievement, she is often described as the first computer programmer; though no programming language had yet been invented.

Lovelace also translated and wrote literature supporting the project. Describing the engine's programming by punch cards, she wrote: "We may say most aptly that the Analytical Engine weaves algebraical patterns just as the Jacquard loom weaves flowers and leaves."

Babbage visited Turin in 1840 at the invitation of Giovanni Plana, who had developed in 1831 an analog computing machine that served as a perpetual calendar. Here in 1840 in Turin, Babbage gave the only public explanation and lectures about the Analytical Engine. In 1842 Charles Wheatstone approached Lovelace to translate a paper of Luigi Menabrea, who had taken notes of Babbage's Turin talks; and Babbage asked her to add something of her own. Fortunato Prandi who acted as interpreter in Turin was an Italian exile and follower of Giuseppe Mazzini.

Swedish followers
Per Georg Scheutz wrote about the difference engine in 1830, and experimented in automated computation. After 1834 and Lardner's Edinburgh Review article he set up a project of his own, doubting whether Babbage's initial plan could be carried out. This he pushed through with his son, Edvard Scheutz. Another Swedish engine was that of Martin Wiberg (1860).

Legacy
In 2011, researchers in Britain proposed a multimillion-pound project, "Plan 28", to construct Babbage's Analytical Engine. Since Babbage's plans were continually being refined and were never completed, they intended to engage the public in the project and crowd-source the analysis of what should be built. It would have the equivalent of 675 bytes of memory, and run at a clock speed of about 7 Hz. They hoped to complete it by the 150th anniversary of Babbage's death, in 2021.

Advances in MEMS and nanotechnology have led to recent high-tech experiments in mechanical computation. The benefits suggested include operation in high radiation or high temperature environments. These modern versions of mechanical computation were highlighted in The Economist in its special "end of the millennium" black cover issue in an article entitled "Babbage's Last Laugh".

Due to his association with the town Babbage was chosen in 2007 to appear on the 5 Totnes pound note. An image of Babbage features in the British cultural icons section of the newly designed British passport in 2015.

Family

On 25 July 1814, Babbage married Georgiana Whitmore, sister of British parliamentarian William Wolryche-Whitmore, at St. Michael's Church in Teignmouth, Devon. The couple lived at Dudmaston Hall, Shropshire (where Babbage engineered the central heating system), before moving to 5 Devonshire Street, London in 1815.

Charles and Georgiana had eight children, but only four – Benjamin Herschel, Georgiana Whitmore, Dugald Bromhead and Henry Prevost – survived childhood. Charles' wife Georgiana died in Worcester on 1 September 1827, the same year as his father, their second son (also named Charles) and their newborn son Alexander.
 * Benjamin Herschel Babbage (1815–1878)
 * Charles Whitmore Babbage (1817–1827)
 * Georgiana Whitmore Babbage (1818 – 26 September 1834)
 * Edward Stewart Babbage (1819–1821)
 * Francis Moore Babbage (1821–????)
 * Dugald Bromhead (Bromheald?) Babbage (1823–1901)
 * (Maj-Gen) Henry Prevost Babbage (1824–1918)
 * Alexander Forbes Babbage (1827–1827)

His youngest surviving son, Henry Prevost Babbage (1824–1918), went on to create six small demonstration pieces for Difference Engine No. 1 based on his father's designs, one of which was sent to Harvard University where it was later discovered by Howard H. Aiken, pioneer of the Harvard Mark I. Henry Prevost's 1910 Analytical Engine Mill, previously on display at Dudmaston Hall, is now on display at the Science Museum.

Death
Babbage lived and worked for over 40 years at 1 Dorset Street, Marylebone, where he died, at the age of 79, on 18 October 1871; he was buried in London's Kensal Green Cemetery. According to Horsley, Babbage died "of renal inadequacy, secondary to cystitis." He had declined both a knighthood and baronetcy. He also argued against hereditary peerages, favouring life peerages instead.

Autopsy report
In 1983, the autopsy report for Charles Babbage was discovered and later published by his great-great-grandson. A copy of the original is also available. Half of Babbage's brain is preserved at the Hunterian Museum in the Royal College of Surgeons in London. The other half of Babbage's brain is on display in the Science Museum, London.

Memorials

There is a black plaque commemorating the 40 years Babbage spent at 1 Dorset Street, London. Locations, institutions and other things named after Babbage include:

 * The Moon crater, Babbage
 * The Charles Babbage Institute, an information technology archive and research center at the University of Minnesota
 * Babbage River Falls, Yukon, Canada
 * The Charles Babbage Premium, an annual computing award
 * British Rail named a locomotive after Charles Babbage in the 1990s.
 * Babbage Island, Western Australia
 * The Babbage Building at the University of Plymouth, where the university's school of computing is based
 * The Babbage programming language for GEC 4000 series minicomputers
 * "Babbage", The Economist 's Science and Technology blog
 * The former chain retail computer and video-games store "Babbage's" (now GameStop) was named after him.

In fiction and film
Babbage frequently appears in steampunk works; he has been called an iconic figure of the genre. Other works in which Babbage appears include:

 * The 2008 short film Babbage, screened at the 2008 Cannes Film Festival, a 2009 finalist with Haydenfilms, and shown at the 2009 HollyShorts Film Festival and other international film festivals. The film shows Babbage at a dinner party, with guests discussing his life and work.
 * Sydney Padua created The Thrilling Adventures of Lovelace and Babbage, a cartoon alternate history in which Babbage and Lovelace succeed in building the Analytical Engine. It quotes heavily from the writings of Lovelace, Babbage and their contemporaries.
 * Kate Beaton, cartoonist of webcomic Hark! A Vagrant, devoted one of her comic strips to Charles and Georgiana Babbage.
 * The Doctor Who episode "Spyfall, Part 2" (Season 12, episode 2) features Charles Babbage and Ada Gordon as characters who assist the Doctor when she's stuck in the year 1834.

Publications

 * (Reissued by Cambridge University Press 2009, ISBN 978-1-108-00000-0.)
 * (The LOCOMAT site contains a reconstruction of this table.)
 * (Reissued by Cambridge University Press 2009, ISBN 978-1-108-00000-0.)
 * (The LOCOMAT site contains a reconstruction of this table.)
 * (Reissued by Cambridge University Press 2009, ISBN 978-1-108-00000-0.)
 * (The LOCOMAT site contains a reconstruction of this table.)
 * (The LOCOMAT site contains a reconstruction of this table.)

title: Charles Babbage


text:
Cross-dressing

Cross-dressing is the act of wearing clothes traditionally or stereotypically associated with a different gender. From as early as pre-modern history, cross-dressing has been practiced in order to disguise, comfort, entertain, and express oneself.

Socialization establishes social norms among the people of a particular society. With regard to the social aspects of clothing, such standards may reflect guidelines relating to the style, color, or type of clothing that individuals are expected to wear. Such expectations may be delineated according to gender roles. Cross-dressing involves dressing contrary to the prevailing standards (or in some cases, laws) for a person of their gender in their own society.

The term "cross-dressing" refers to an action or a behavior, without attributing or implying any specific causes or motives for that behavior. Cross-dressing is not synonymous with being transgender.

Terminology
The phenomenon of cross-dressing is seen throughout recorded history, being referred to as far back as the Hebrew Bible. The terms used to describe it have changed throughout history; the Anglo-Saxon-rooted term "cross-dresser" is viewed more favorably than the Latin-origin term "transvestite" in some circles, where it has come to be seen as outdated and derogatory. Its first mention originated in Magnus Hirschfeld's Die Transvestiten (The Transvestites) in 1910, originally associating cross-dressing with non-heterosexual behavior or derivations of sexual intent. Its connotations largely changed in the 20th century as its use was more frequently associated with sexual excitement, otherwise known as transvestic disorder. This term was historically used to diagnose psychiatric disorders (e.g. transvestic fetishism), but the former (cross-dressing) was coined by the transgender community. The Oxford English Dictionary gives 1911 as the earliest citation of the term "cross-dressing", by Edward Carpenter: "Cross-dressing must be taken as a general indication of, and a cognate phenomenon to, homosexuality". In 1928, Havelock Ellis used the two terms "cross-dressing" and "transvestism" interchangeably. The earliest citations for "cross-dress" and "cross-dresser" are 1966 and 1976, respectively.

En femme and en homme
The term en femme is a lexical borrowing of a French phrase. It is used in the transgender and crossdressing community to describe the act of wearing feminine clothing or expressing a stereotypically feminine personality. The term is borrowed from the modern French phrase en femme  meaning "as a woman." Most crossdressers also use a female name whilst en femme; that is their "femme name". In the cross-dressing community the persona a man adopts when he dresses as a woman is known as his "femme self".

Between 1987 and 1991, JoAnn Roberts and CDS published a magazine called "En Femme" that was "for the transvestite, transsexual, crossdresser, and female impersonator."

En homme is a similar anglicized adaptation of a French phrase, used to describe the act of wearing masculine clothing or expressing a stereotypically masculine personality. The term is derived from the modern colloquial French phrase en tant qu'homme meaning "as a man" and the anglicized adaptation en homme literally translates as "in man". Most crossdressers also use a masculine name whilst en homme.

Non-Western history

Cross-dressing has been practiced throughout much of recorded history, in many societies, and for many reasons. Examples exist in Greek, Norse, and Hindu mythology. Cross-dressing can be found in theater and religion, such as kabuki, Noh, and Korean shamanism, as well as in folklore, literature, and music. For instance, in examining kabuki culture during Japan's edo period, cross-dressing was not only used for theater purposes but also because current societal trends: cross-dressing and the switching of genders was a familiar concept to the Japanese at the time which allowed them to interchange characters's genders easily and incorporate geisha fashion into men's wear. This was especially common in the story-telling of ancient stories such as the character Benten from Benten Kozō. He was a thief in the play cross-dressing as a woman. Cross-dressing was also exhibited in Japanese Noh for similar reasons. Societal standards at the time broke boundaries between gender. For example, ancient Japanese portraits of aristocrats have no clear differentiation in characteristics between male and female beauty. Thus, in Noh performance, the cross-dressing of actors was common; especially given the ease of disguising biological sex with the use of masks and heavy robes. In a non-entertainment context, cross-dressing is also exhibited in Korean shamanism for religious purposes. Specifically, this is displayed in chaesu-gut, a shamanistic rite gut in which a shaman offers a sacrifice to the spirits to intermediate in the fortunes of the intended humans for the gut. Here, cross-dressing serves many purposes. Firstly, the shaman (typically a woman) would cross-dress as both male and female spirits can occupy her. This allows her to represent the opposite sex and become a cross-sex icon in 75% of the time of the ritual. This also allows her to become a sexually liminal being. It is clear that in entertainment, literature, art, and religion, different civilizations have utilized cross-dressing for many different purposes.

Western history
In the British and European context, theatrical troupes ("playing companies") were all-male, with the female parts undertaken by boy players.

The Rebecca Riots took place between 1839 and 1843 in West and Mid Wales. They were a series of protests undertaken by local farmers and agricultural workers in response to unfair taxation. The rioters, often men dressed as women, took their actions against toll-gates, as they were tangible representations of high taxes and tolls. The riots ceased prior to 1844 due to several factors, including increased troop levels, a desire by the protestors to avoid violence and the appearance of criminal groups using the guise of the biblical character Rebecca for their own purposes. In 1844 an Act of Parliament to consolidate and amend the laws relating to turnpike trusts in Wales was passed.

A variety of historical figures are known to have cross-dressed to varying degrees. Many women found they had to disguise themselves as men in order to participate in the wider world. For example, it is postulated that Margaret King cross-dressed in the early 19th century to attend medical school, as universities at that time accepted only male students. A century later, Vita Sackville-West dressed as a young soldier in order to "walk out" with her girlfriend Violet Keppel, to avoid the street harassment that two women would have faced. The prohibition on women wearing male garb, once strictly applied, still has echoes today in some Western societies which require girls and women to wear skirts, for example as part of school uniform or office dress codes. In some countries, even in casual settings, women are still prohibited from wearing traditionally male clothing.

Legal issues
In many countries, cross-dressing was illegal under laws that identified it as indecent or immoral. Many such laws were challenged in the late 1900s giving people the right to freedom of gender expression with regard to their clothing.

For instance, from 1840 forward, United States saw state and city laws forbidding people from appearing in public while dressed in clothes not commonly associated with their assigned sex. The goal of this wave of policies was to create a tool that would enforce a normative gender narrative, targeting multiple gender identities across the gender spectrum. With the progression of time, styles, and societal trends, it became even more difficult to draw the line between what was cross-dressing or not. Only recently have these laws changed. As recently as 2011, it was still possible for a man to get arrested for "impersonating a woman" — a vestige of the 19th century laws. Even with this, legal issues surrounding cross-dressing perpetuated all throughout the mid 20th century. During this time period, police would often reference laws that did not exist or laws that have been repealed in order to target the LGBTQ+ community.

This extends beyond the United States: There still remains 13 UN member States that explicitly criminalize transgender individuals, and there exist even more countries that use a great deal of diverse laws to target them. The third edition of the Trans Legal Mapping Report, done by the International Lesbian, Gay, Bisexual, Trans, and Intersex Association found that an especially common method to target these individuals is through cross-dressing regulations. For instance, only in 2014 did an appeal court in Malaysia finally overturn a state law prohibiting Muslim men from cross-dressing as women.

In the Australian state of Tasmania, cross-dressing in public was made a criminal offence in 1935, and this law was only repealed in 2000.

Nepal decriminalized cross-dressing in 2007.

Varieties
There are many different kinds of cross-dressing and many different reasons why an individual might engage in cross-dressing behavior. Some people cross-dress as a matter of comfort or style, a personal preference for clothing associated with the opposite gender. Some people cross-dress to shock others or challenge social norms; others will limit their cross-dressing to underwear, so that it is not apparent. Some people attempt to pass as a member of the opposite gender in order to gain access to places or resources they would not otherwise be able to reach.

Theater and performance
Single-sex theatrical troupes often have some performers who cross-dress to play roles written for members of the opposite sex (travesti and trouser roles). Cross-dressing, particularly the depiction of males wearing dresses, was historically used for comic effect onstage and on-screen.

Boy player refers to children who performed in Medieval and English Renaissance playing companies. Some boy players worked for the adult companies and performed the female roles as women did not perform on the English stage in this period. Others worked for children's companies in which all roles, not just the female ones, were played by boys.

In an effort to clamp down on kabuki's popularity, women's kabuki, known as, was banned in 1629 in Japan for being too erotic. Following this ban, young boys began performing in, which was also soon banned. Thus adult men play female roles in kabuki.

Dan is the general name for female roles in Chinese opera, often referring to leading roles. They may be played by male or female actors. In the early years of Peking opera, all roles were played by men, but this practice is no longer common in any Chinese opera genre.

Women have often been excluded from Noh, and men often play female characters in it.

Drag is a special form of performance art based on the act of cross-dressing. A drag queen is usually a male-assigned person who performs as an exaggeratedly feminine character, in heightened costuming sometimes consisting of a showy dress, high-heeled shoes, obvious make-up, and wig. A drag queen may imitate famous female film or pop-music stars. A faux queen is a female-assigned person employing the same techniques. A drag king is a counterpart of the drag queen – a female-assigned person who adopts a masculine persona in performance or imitates a male film or pop-music star. Some female-assigned people undergoing Gender-affirming surgery also self-identify as 'drag kings'.The modern activity of battle reenactments has raised the question of women passing as male soldiers. In 1989, Lauren Burgess dressed as a male soldier in a U.S. National Park Service reenactment of the Battle of Antietam, and was ejected after she was discovered to be a woman. Burgess sued the Park Service for sexual discrimination. The case spurred spirited debate among Civil War buffs. In 1993, a federal judge ruled in Burgess's favor.

"Wigging" refers to the practice of male stunt doubles taking the place of an actress, parallel to "paint downs", where white stunt doubles are made up to resemble black actors. Female stunt doubles have begun to protest this norm of "historical sexism", saying that it restricts their already limited job possibilities.

British pantomime, television and comedy
Cross-dressing is a traditional popular trope in British comedy. The pantomime dame in British pantomime dates from the 19th century, which is part of the theatrical tradition of female characters portrayed by male actors in drag. Widow Twankey (Aladdin's mother) is a popular pantomime dame: in 2004 Ian McKellen played the role.

The Monty Python comedy troupe donned frocks and makeup, playing female roles while speaking in falsetto. Character comics such as Benny Hill and Dick Emery drew upon several female identities. In the BBC's long-running sketch show The Dick Emery Show (broadcast from 1963 to 1981), Emery played Mandy, a busty peroxide blonde whose catchphrase, "Ooh, you are awful ... but I like you!", was given in response to a seemingly innocent remark made by her interviewer, but perceived by her as ribald double entendre. The popular tradition of cross dressing in British comedy extended to the 1984 music video for Queen's "I Want to Break Free" where the band parody several female characters from the soap opera Coronation Street.

Sexual fetishes
A transvestic fetishist is a person who cross-dresses as part of a sexual fetish. According to the fourth edition of Diagnostic and Statistical Manual of Mental Disorders, this fetishism was limited to heterosexual men; however, DSM-5 does not have this restriction, and opens it to women and men, regardless of their sexual orientation.

Sometimes either member of a heterosexual couple will cross-dress in order to arouse the other. For example, the male might wear skirts or lingerie and/or the female will wear boxers or other male clothing. (See also forced feminization)

Passing
Some people who cross-dress may endeavor to project a complete impression of belonging to another gender, including mannerisms, speech patterns, and emulation of sexual characteristics. This is referred to as passing or "trying to pass", depending how successful the person is. An observer who sees through the cross-dresser's attempt to pass is said to have "read" or "clocked" them. There are videos, books, and magazines on how a man may look more like a woman.

Others may choose to take a mixed approach, adopting some feminine traits and some masculine traits in their appearance. For instance, a man might wear both a dress and a beard. This is sometimes known as "genderfuck". In a broader context, cross-dressing may also refer to other actions undertaken to pass as a particular sex, such as packing (accentuating the male crotch bulge) or, the opposite, tucking (concealing the male crotch bulge).

Gender disguise
Gender disguise has been used by women and girls to pass as male, and by men and boys to pass as female. Gender disguise has also been used as a plot device in storytelling, particularly in narrative ballads, and is a recurring motif in literature, theater, and film. Historically, some women have cross-dressed to take up male-dominated or male-exclusive professions, such as military service. Conversely, some men have cross-dressed to escape from mandatory military service or as a disguise to assist in political or social protest, as men in Wales did in the Rebecca Riots and when conducting Ceffyl Pren as a form of mob justice.

Sports
Conversation surrounding exclusion and gender inequality in sports has been around for decades. Some women have dressed as men to enter male sports, or registered in male sports using an alias.

Roberta "Bobbi" Gibb
Roberta "Bobbi" Gibb is the first woman to have competed in the Boston Marathon. In 1966 Bobbi Gibb wrote a letter to the Boston Athletic Association asking to participate in the race happening that year. When Gibb received her letter back in the mail she was faced with the news that her entry to the race was denied due to her gender. Rather than just accept her fate, Gibb did not take no for an answer and decided to run the marathon anyways—however, she would do it hidden as a man. On the day of the race Gibb showed up in an oversized sweatshirt, her brother's shorts, and men's running shoes. Gibb hid in the bushes until the race started and then joined in with the crowd. Eventually her fellow runners figured out Gibb's real gender but stated that they would make sure that she finished the race. Gibb ended up finishing her first Boston Marathon in 3 hours, 27 minutes and 40 seconds. She crossed the finish line with blistered, bleeding feet from the men's running shoes she was wearing. Gibb's act of defiance influenced other women marathon runners of the time like Katherine Switzer, who also registered under an alias to be able to run the race in 1967. It would not be until 1972 until there was an official women's race within the Boston Marathon.

Sam Kerr
Sam Kerr is a forward for the Australian Women's Soccer Team and Chelsea FC in the FA Women's Super League. Kerr has been regarded as one of the best forward players in the sport and has been one of the most highly paid players in women's soccer as well. While Kerr now shares the world state with other great women soccer players, as a young child she shared the field with young boys. Kerr grew up in a suburb of Perth where there was little to no access to young girls soccer teams in the direct area. Not having a girls team to play on did not bother Kerr though, she simply played on a youth boys team where all of her teammates just assumed she was also a boy. Kerr states in her book My Journey to the World Cup that she continued to hide her gender because she did not want to be treated any differently. In her book Kerr also revealed that when one of her teammates found out that she was, in fact a girl, he cried. While Kerr's act of hiding her gender was initially an accident, it is still an example of how women (and in the case a young girl) can create opportunities for themselves by looking or acting as a man.

War
One of the most common instances of gender disguise is in the instance of war/militaristic situations. From Joan of Arc in the 15th century to Mulan from the animated Disney Mulan to young girls in World War II, there have been many different people of many different sexes that disguise themselves as men in order to be able to fight in wars.

Joan of Arc
Born c. 1412, St Joan of Arc or the Maid of Orleans is one of the oldest examples of gender disguise. At 13, after receiving a revelation that she was supposed to lead the French to victory over the English in the 100 years war, Joan donned the clothing of a male soldier in the French army. Joan was able to convince King Charles the VIII to allow her to take the lead of some of the French armies in order to help him get his crown back. Ultimately, Joan of Arc was successful in claiming victory over the English but was captured in 1430 and found guilty of heresy, leading to her execution in 1431.The impact of her actions was seen even after Joan's death in 1431. During the suffragette movement, Joan of Arc was used as an inspiration for the movement, particularly in Britain where many used her actions as fuel for their fight for political reform.

Deborah Sampson
Born in 1760 in Plympton, Massachusetts, Deborah Sampson was the first female soldier in the US Army. The only woman in the Revolution to receive a full military pension, at age 18 Deborah took the name “Robert Shirtleff” and enlisted in union forces. In her capacity as a soldier, she was very successful, being named captain and leading an infantry in the capture of 15 enemy soldiers among other things. One and a half years into service, her true sex was revealed when she had to receive medical care. Following an honorable discharge, Deborah petitioned congress for her full pay that was withheld on the grounds of being an “invalid soldier” and eventually received it. She died in 1827 at age 66. Even after her death, Deborah Sampson continues to be a "hero of the American Revolution". In 2019, a diary from corporal Abner Weston shares about Deborah Sampson's previously unknown first attempt to enlist in the Continental Army.

These women are just a few among many who have disguised themselves as men in order to be able to fight in many different wars. Others who have used gender disguise for this purpose include Kit Kavanaugh/Christian Davies, Hannah Snell, Sarah Emma Edmonds, Frances Clayton, Dorothy Lawrence, Zoya Smirnow, and Brita Olofsdotter.

Journalism and culture
In some instances, women in journalism deem is necessary to wear the identity of a man in order to gather information that is only accessible from the male point of view. In other cases, people cross-dress to navigate certain cultures and/or specific circumstances that involve strict gender norms and expectations.

Norah Vincent
Norah Vincent, author of the book Self-Made Man: One Woman's Journey Into Manhood and Back Again, used gender disguise in order to go undercover as a man to penetrate men's social circles and experience life as a man. In 2003, Vincent put her life on pause to adopt a new masculine identity as Ned Vincent. She worked with a makeup artist and vocal coach in order to convincingly play the role of a biological man. She wore an undersized sports bra, a stuffed jock strap, and size 11½ shoes to deceive those around her. In her book, Vincent makes discoveries about socialization, romance, sex, and stress as a man that leads her to conclude that, “[Men] have different problems than women have, but they don't have it better.” However, Vincent developed controversial opinions about sex and gender, claiming that transgender people are not legitimate until they undergo hormone therapy and surgical intervention. After writing Self-Made Man, Vincent became a victim of depression; she died by medically assisted suicide in 2022.

Bacha posh
Bacha posh, an Afghani tradition, involves the crossdressing of young Afghan girls by their families so that they present to the public as boys. Families engage in bacha posh so that their daughters may avoid the oppression that women face under Afghanistan's deeply patriarchal society. Other reasons for having a bacha posh daughter include economic pressure, as girls and women are generally prohibited from work in contemporary Afghanistan, and social pressure, as families with boys tend to be more well regarded in Afghan society. While there is no law that prohibits bacha posh, girls are expected to revert to traditional gender norms upon reaching puberty. According to Thomas Barfield, an anthropology professor at Boston University, bacha posh is "one of the most under-investigated" topics in the realm of gender studies, making difficult to determine exactly how common the practice is in Afghan society. However, some prominent female figures in Afghan society have admitted to being bacha posh in their youth. A more famous example of this is Afghan parliament member Azita Rafaat. Rafaat claims that bacha posh was a positive experience that built her self-confidence in Afghanistan's heavily patriarchal society and gave her a more well rounded understanding of women's issues in Afghanistan.

Fashion

The actual determination of cross-dressing is largely socially constructed. For example, in Western society, trousers have long been adopted for usage by women, and it is no longer regarded as cross-dressing. In cultures where men have traditionally worn skirt-like garments such as the kilt or sarong, these are not seen as women's clothing, and wearing them is not seen as cross-dressing for men. In many parts of the world, it remains socially disapproved for men to wear clothes traditionally associated with women.

Cosplaying may also involve cross-dressing, for some females may wish to dress as a male, and vice versa (see crossplay). Females may choose to chest bind while cosplaying a male character.

While creating a more feminine figure, male cross-dressers will may utilize breast forms or breast plates to give the appearance of breasts. Some male cross-dressers may also cinch their waists or use padding to create a profile that appears more stereotypically feminine.

While most male cross-dressers utilize clothing associated with modern women, some are involved in subcultures that involve dressing as little girls or in vintage clothing. Some such men have written that they enjoy dressing as femininely as possible, so they wear frilly dresses with lace and ribbons, bridal gowns complete with veils, as well as multiple petticoats, corsets, girdles and/or garter belts with nylon stockings.

The term underdressing is used by male cross-dressers to describe wearing female undergarments such as panties under their male clothes. The famous low-budget film-maker Edward D. Wood Jr. (who also went out in public dressed in drag as "Shirley", his female alter ego ) said he often wore women's underwear under his military uniform as a Marine during World War II. Female masking is a form of cross-dressing in which men wear masks that present them as female.

Some drag kings may use binders or chest plates to give the impression of a more stereotypically male physique, but others forego this. They may also paste or draw on fake facial hair. Drag kings and assigned female at birth cosplayers may use socks or a phallic prosthetic for packing to create the appearance of a male bulge.

Social issues
Cross-dressers may begin wearing clothing associated with the opposite sex in childhood, using the clothes of a sibling, parent, or friend. Some parents have said they allowed their children to cross-dress and, in many cases, the child stopped when they became older. The same pattern often continues into adulthood, where there may be confrontations with a spouse, partner, family member or friend. Married cross-dressers can experience considerable anxiety and guilt if their spouse objects to their behavior.

Sometimes because of guilt or other reasons cross-dressers dispose of all their clothing, a practice called "purging", only to start collecting the other gender's clothing again.

Festivals
Celebrations of cross-dressing occur in widespread cultures. The Abissa festival in Côte d'Ivoire, Ofudamaki in Japan, and Kottankulangara Festival in India are all examples of this.

Analysis
Advocacy for social change has done much to relax the constrictions of gender roles on men and women, but they are still subject to prejudice from some people. It is noticeable that as being transgender becomes more socially accepted as a normal human condition, the prejudices against cross-dressing are changing quite quickly, just as the similar prejudices against homosexuals have changed rapidly in recent decades.

The reason it is so hard to have statistics for female cross-dressers is that the line where cross-dressing stops and cross-dressing begins has become blurred, whereas the same line for men is as well defined as ever. This is one of the many issues being addressed by third wave feminism as well as the modern-day masculist movement.

The general culture has very mixed views about cross-dressing. A woman who wears her husband's shirt to bed is considered attractive, while a man who wears his wife's nightgown to bed may be considered transgressive. Marlene Dietrich in a tuxedo was considered very erotic; Jack Lemmon in a dress was considered ridiculous. All this may result from an overall gender role rigidity for males; that is, because of the prevalent gender dynamic throughout the world, men frequently encounter discrimination when deviating from masculine gender norms, particularly violations of heteronormativity. A man's adoption of feminine clothing is often considered a going down in the gendered social order whereas a woman's adoption of what are traditionally men's clothing (at least in the English-speaking world) has less of an impact because women have been traditionally subordinate to men, unable to affect serious change through style of dress. Thus when a male cross-dresser puts on his clothes, he transforms into the quasi-female and thereby becomes an embodiment of the conflicted gender dynamic. Following the work of Judith Butler, gender proceeds along through ritualized performances, but in male cross-dressing it becomes a performative "breaking" of the masculine and a "subversive repetition" of the feminine.

Psychoanalysts today do not regard cross-dressing by itself as a psychological problem, unless it interferes with a person's life. "For instance," said Joseph Merlino, senior editor of Freud at 150: 21st Century Essays on a Man of Genius, "[suppose that]...I'm a cross-dresser and I don't want to keep it confined to my circle of friends, or my party circle, and I want to take that to my wife and I don't understand why she doesn't accept it, or I take it to my office and I don't understand why they don't accept it, then it's become a problem because it's interfering with my relationships and environment."

Fashion trends
Cross-dressing today is much more common and normalized thanks to trends such as camp fashion and androgynous fashion. These trends have long histories but have recently been popularized thanks to major designers, fashion media, and celebrities today. Camp is a style of fashion that has had a long history extending all the way back to the Victorian era to the modern era. During the Victorian era up until the mid-20th century, it was defined as an exaggerated and flamboyant style of dressing. This was typically associated with ideas of effeminacy, de-masculization, and homosexuality. As the trend entered the 20th century, it also developed an association with a lack of conduct, creating the connotation that those who engaged in Camp are unrefined, improper, distasteful, and, essentially, undignified. Though this was its former understanding, Camp has now developed a new role in the fashion industry. It is considered a fashion style that has "failed seriousness" and has instead become a fun way of self-expression. Thanks to its integration with high fashion and extravagance, Camp is now seen as a high art form of absurdity: including loud, vibrant, bold, fun, and empty frivolity. Camp is often used in drag culture as a method of exaggerating or inversing traditional conceptions of what it means to be feminine. In actuality, the QTPOC community has had a large impact on Camp. This is exhibited by ballroom culture, camp/glamour queens, Black '70s funk, Caribbean Carnival costumes, Blaxploitation movies, "pimp/player fashion", and more. This notion has also been materialized by camp icons such as Josephine Baker and RuPaul.

Androgynous fashion is described as neither masculine nor feminine rather it is the embodiment of a gender inclusive and sexually neutral fashion of expression. The general understanding of androgynous fashion is mixing both masculine and feminine pieces with the goal of producing a look that has no visual differentiations between one gender or another. This look is achieved by masking the general body so that one cannot identify the biological sex of an individual given the silhouette of the clothing pieces: Therefore, many androgynous looks include looser, baggier clothing that can conceal curves in the female body or using more "feminine" fabrics and prints for men. Both of these style forms have been normalized and popularized by celebrities such as Harry Styles, Timothée Chalamet, Billie Eilish, Princess Diana, and more.

Societal changes
Beyond fashion, cross-dressing in non-Western countries has not fully outgrown the negative connotations that it has in the West. For instance, many Eastern and Southeastern Asian countries have a narrative of discrimination and stigma against LGBTQ+ and cross-dressing individuals. This is especially evident in the post-pandemic world. During this time, it was clear to see the failures of these governments to provide sufficient support to these individuals due to a lack of legal services, lack of job opportunity, and more. For instance, to be able to receive government aid, these individuals need to be able to quickly change their legal name, gender, and other information on official ID documents. This fault augmented the challenges of income loss, food insecurity, safe housing, healthcare, and more for many trans and cross-dressing individuals. This was especially pertinent as many of these individuals relied on entertainment and sex work for income. With the pandemic removing these job opportunities, the stigmatisation and discrimination against these individuals only increased, especially in Southeast Asian countries.

On the other hand, some Asian countries have grown to be more accepting of cross-dressing as modernization has increased. For instance, among Japan's niche communities, there exists the otokonoko. This is a group of male-assigned individuals who engage in female cross-dressing as a form of gender expression. This trend originated with manga and grew with an increase in maid cafes, cosplaying, and more in the 2010s. With the normalization of this through cosplay, cross-dressing has become a large part of otaku and anime culture.

In 2023 Noor Alsaffar, an Iraqi vlogger and model, who described themselves as a cross-dresser, was murdered. The killing of Alsaffar appears to be linked to an increase in homophobia and transphobia in Iraq.

Across media
Women dressed as men, and less often men dressed as women, is a common trope in fiction and folklore. For example, in Thrymskvitha, Thor disguised himself as Freya. These disguises were also popular in Gothic fiction, such as in works by Charles Dickens, Alexandre Dumas, père, and Eugène Sue, and in a number of Shakespeare's plays, such as Twelfth Night. In The Wind in the Willows, Toad dresses as a washerwoman, and in The Lord of the Rings, Éowyn pretends to be a man.

In science fiction, fantasy and women's literature, this literary motif is occasionally taken further, with literal transformation of a character from male to female or vice versa. Virginia Woolf's Orlando: A Biography focuses on a man who becomes a woman, as does a warrior in Peter S. Beagle's The Innkeeper's Song; while in Geoff Ryman's The Warrior Who Carried Life, Cara magically transforms herself into a man.

Other popular examples of gender disguise include Madame Doubtfire (published as Alias Madame Doubtfire in the United States) and its movie adaptation Mrs. Doubtfire, featuring a man disguised as a woman. Similarly, the movie Tootsie features Dustin Hoffman disguised as a woman, while the movie The Associate features Whoopi Goldberg disguised as a man. Japanese fashion designer and visual kei musician Mana of the bands Malice Mizer and Moi dix Mois is notable for wearing traditionally female clothes. He is credited with popularizing cross-dressing among visual kei bands.

Medical views
The International Statistical Classification of Diseases and Related Health Problems listed dual-role transvestism (non-sexual cross-dressing) and fetishistic transvestism (cross-dressing for sexual pleasure) as disorders in its 10th edition, but both were removed for the 11th edition, which came into effect in 2022. Transvestic fetishism is a paraphilia and a psychiatric diagnosis in the DSM-5 version of the Diagnostic and Statistical Manual of Mental Disorders.

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/

title: Cross-dressing