Charles Babbage - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Charles_Babbage

Charles Babbage

1 of 7 Sunday 16 May 2010 12:49 PM Charles Babbage - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Charles_Babbage

From Wikipedia, the free encyclopedia

Charles Babbage, FRS (26 December 1791 – 18 October 1871)[2] was an English Charles Babbage mathematician, philosopher, inventor, and mechanical engineer who originated the concept of a programmable computer.[3] Parts of his uncompleted mechanisms are on display in the London Science Museum. In 1991, a perfectly functioning difference engine was constructed from Babbage's original plans. Built to tolerances achievable in the 19th century, the success of the finished engine indicated that Babbage's machine would have worked. Nine years later, the Science Museum completed the printer Babbage had designed for the difference engine, an astonishingly complex device for the 19th century. Considered a "father of the computer",[4] Babbage is credited with inventing the first mechanical computer that eventually led to more complex designs.

Contents

1 Birth The Illustrated London News (4 November 2 Education 1871).[1] 3 Marriage, family, death 4 Design of computers Born 25 December 1792 4.1 Difference engine London, England 4.1.1 Completed models Died 18 October 1871 (aged 79) Marylebone, London, England 4.2 Analytical engine Nationality 4.3 Modern adaptations United Kingdom Fields Mathematics, analytical 5 Other accomplishments philosophy, computer science 6 Eccentricities Institutions Trinity College, Cambridge 7 Quotations 8 Commemoration Alma mater Peterhouse, Cambridge 9 Publications Known for Mathematics, computing. 10 References Signature 11 External links

Birth

Babbage's birthplace is disputed, but 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 25 December 1792. However after the obituary appeared, a nephew wrote to say that Charles 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.[5][6][7]

Babbage's father, Benjamin Babbage, was a banking partner of the Praeds who owned the Bitton Estate in Teignmouth. His mother was Betsy Plumleigh Teape. In 1808, the Babbage family moved into the old Rowdens house in East Teignmouth, and Benjamin Babbage became a warden of the nearby St. Michael’s Church.

Education

His father's money allowed Charles to receive instruction from several schools and tutors during the course of his elementary education. Around the age of eight he was sent to a country school in Alphington near Exeter to recover from a life-threatening fever. His parents ordered that his "brain was not to be taxed too much" and Babbage felt that "this great idleness may have led to some of my childish reasonings." 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.[8] He then joined a 30-student Holmwood academy, in Baker Street, Enfield, Middlesex under Reverend Stephen Freeman. The academy had a well-stocked library that prompted Babbage's love of mathematics. He studied with two more private tutors after leaving the academy. Of the first, a clergyman near Cambridge, Babbage said, "I fear I did not derive from it all the advantages that I might have done." The second was an Oxford tutor from whom Babbage learned enough of the Classics to be accepted to Cambridge.

Babbage arrived at Trinity College, Cambridge in October 1810.[9] He had read extensively in Leibniz, Joseph Louis Lagrange, Thomas Simpson, and Lacroix and was seriously disappointed in the mathematical instruction available at Cambridge. In response, he, John Herschel, George Peacock, and several other friends formed the Analytical Society in 1812. Babbage, Herschel, and Peacock were also close friends with future judge and patron of science Edward Ryan. Babbage and Ryan married two sisters.[10] 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.[11][12]

In 1812 Babbage transferred to Peterhouse, Cambridge.[9] He was the top mathematician at Peterhouse, but did not graduate with honours. He instead received an honorary degree without examination in 1814.

Marriage, family, death

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On 25 July 1814, Babbage married Georgiana Whitmore at St. Michael's Church in Teignmouth, Devon. The couple lived at Dudmaston Hall,[13] Shropshire (where Babbage engineered the central heating system), before moving to 5 Devonshire Street, Portland Place, London.

Charles and Georgiana had eight children,[14] but only three — Benjamin Herschel, Georgiana Whitmore, and Henry Prevost — survived to adulthood. Georgiana died in Worcester on 1 September 1827. Charles' father, wife, and at least one son all died in 1827. These deaths caused Babbage to go into a mental breakdown which delayed the construction of his machines.

His youngest son, Henry Prevost Babbage (1824–1918), went on to create six working difference Grave of Charles Babbage engines based on his father's designs,[15] one of which was sent to Harvard University where it was later at Kensal Green Cemetery 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.[16]

Charles Babbage died at age 79 on 18 October 1871, and was buried in London's Kensal Green Cemetery. According to Horsley, Babbage died "of renal inadequacy, secondary to cystitis."[17] In 1983 the autopsy report for Charles Babbage was discovered and later published by one of his descendants.[18][19] A copy of the original is also available.[20] Half of Babbage's brain is preserved at the Hunterian Museum in the Royal College of Surgeons in London.[21][22]

Design of computers

Babbage sought a method by which mathematical tables could be calculated mechanically, removing the high rate of human error. Three different factors seem to have influenced him: a dislike of untidiness; his experience working on logarithmic tables; and existing work on calculating machines carried out by Wilhelm Schickard, Blaise Pascal, and Gottfried Leibniz. He first discussed the principles of a calculating engine in a letter to Sir Humphry Davy in 1822.

Babbage's machines were among the first mechanical computers, although they were not actually completed, largely because of funding problems and personality issues. He directed the building of some steam-powered machines that achieved some success, suggesting that calculations could be mechanised. Although Babbage's machines were mechanical and unwieldy, their basic architecture was very similar to 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.

Difference engine

Main article: Difference engine Part of Babbage's difference engine, assembled after his In Babbage’s time, numerical tables were calculated by humans who were called ‘computers’, meaning death by Babbage's son, "one who computes", much as a conductor is "one who conducts". At Cambridge, he saw the high using parts found in his error-rate of this human-driven process and started his life’s work of trying to calculate the tables laboratory. mechanically. He began in 1822 with what he called the difference engine, made to compute values of polynomial functions. Unlike similar efforts of the time, Babbage's difference engine 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.

The first difference engine was composed of around 25,000 parts, weighed fifteen tons (13,600 kg), and stood 8 ft (2.4 m) high. Although he received ample funding for the project, it was never completed. He later designed an improved version, "Difference Engine No. 2", which was not constructed until 1989–1991, using Babbage's plans and 19th century manufacturing tolerances. It performed its first calculation at the London Science Museum returning results to 31 digits, far more than the average modern pocket calculator.

Completed models

The London Science The London Science Museum has constructed two Difference Engines, according to Babbage's plans for Museum's Difference the Difference Engine No 2. One is owned by the museum; the other, owned by technology millionaire [23] Engine #2, built from Nathan Myhrvold, went on exhibit at the Computer History Museum in Mountain View, California on [24] Babbage's design. 10 May 2008. The two models that have been constructed are not replicas; until the assembly of the first Difference Engine No 2 by the London Science Museum, no model of the Difference Engine No 2 existed.

Analytical engine

Main article: Analytical engine

Soon after the attempt at making the difference engine crumbled, Babbage started designing a different, more complex machine called the Analytical Engine. The engine is not a single physical machine but a succession of designs that he tinkered with until his death in 1871. The main difference between the two engines is that the Analytical Engine could be programmed using punched cards. He realized that programs could be put on these cards so the person had only to create the program initially, and then put the cards in the machine and let it run. The analytical engine would have used loops of Jacquard's punched cards to control a mechanical calculator, which could formulate results based on the results of preceding computations. This machine was also intended to employ several features subsequently used in modern computers, including sequential control, branching, and looping, and would have been the first mechanical device to be Turing-complete.

Ada Lovelace, an impressive mathematician, and one of the few people who fully understood Babbage's ideas, created a program for the Analytical Engine. Had the Analytical Engine ever actually been built, her program would have been able to calculate a sequence

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of Bernoulli numbers. Based on this work, Lovelace is now widely credited with being the first computer programmer.[25] In 1979, a contemporary programming language was named Ada in her honour. Shortly afterward, in 1981, a satirical article by Tony Karp in the magazine Datamation described the Babbage programming language as the "language of the future".[26]

Modern adaptations

While the abacus and mechanical calculator have been replaced by electronic calculators using microchips, the recent 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.[27] These modern versions of mechanical computation were highlighted in the magazine The Economist in its special "end of the millennium" black cover issue in an article entitled "Babbage's Last Laugh".[28]

Other accomplishments

In 1824, Babbage won the Gold Medal of the Royal Astronomical Society "for his invention of an engine for calculating mathematical and astronomical tables." He was a founding member of the society and one of its oldest living members on his death in 1871.

From 1828 to 1839 Babbage was Lucasian Professor of Mathematics at Cambridge. He contributed largely to several scientific periodicals, and was instrumental in founding the Astronomical Society in 1820 and the Statistical Society in 1834. However, he dreamt of designing mechanical calculating machines.

“... I was sitting in the rooms of the Analytical Society, at Cambridge, my head leaning forward on the table in a kind of dreamy mood, with a table of logarithms lying open before me. Another member, coming into the room, and seeing me half asleep, called out, "Well, Babbage, what are you dreaming about?" to which I replied "I am thinking that all these tables" (pointing to the logarithms) "might be calculated by machinery. "

In 1837, responding to the Bridgewater Treatises, of which there were eight, he published his Ninth Bridgewater Treatise, "On the Power, Wisdom and Goodness of God, as manifested in the Creation", putting forward the thesis that God had the omnipotence and foresight to create as a divine legislator, making laws (or programs) which then produced species at the appropriate times, rather than continually interfering with ad hoc miracles each time a new species was required. The book is a work of natural theology, and incorporates extracts from correspondence he had been having with John Herschel on the subject.

Babbage also achieved notable results in cryptography. He broke Vigenère's autokey cipher as well as the much weaker cipher that is called Vigenère cipher today. The autokey cipher was generally called "the undecipherable cipher", though owing to popular confusion, many thought that the weaker polyalphabetic cipher was the "undecipherable" one. Babbage's discovery was used to aid English military campaigns, and was not published until several years later; as a result credit for the development was instead given to Friedrich Kasiski, a Prussian infantry officer, who made the same discovery some years after Babbage.[29]

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 and performed several studies on Isambard Kingdom Brunel's Great Western Railway in about 1838.[30] Babbage's eldest son, Benjamin Herschel Babbage, worked as an engineer for Brunel on the railways before emigrating to Australia in the 1850s.[31]

Babbage also invented an ophthalmoscope, but although he gave it to a physician for testing it was forgotten, and the device only came into use after being independently invented by Hermann von Helmholtz.[32]

Babbage twice stood for Parliament as a candidate for the borough of Finsbury. In 1832 he came in third among five candidates, but in 1834 he finished last among four.[33][34][35]

In On the Economy of Machine and Manufacture, Babbage described what is now called the Babbage principle, which describes certain advantages with division of labour. Babbage noted that highly skilled – and thus generally highly paid – workers spend parts of their job performing tasks that are 'below' their skill level. If the labour process can be divided among several workers, it is possible to assign only high-skill tasks to high-skill and -cost workers and leave other working tasks to less-skilled and paid workers, thereby cutting labour costs. This principle was criticised by Karl Marx who argued that it caused labour segregation and contributed to alienation. The Babbage principle is an inherent assumption in Frederick Winslow Taylor's scientific management.

Eccentricities

Babbage 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".[36][37][38] 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.[39]

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.[40] 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."[41]

Babbage once contacted the poet Alfred Tennyson in response to his poem "The Vision of Sin". Babbage wrote, "In your otherwise beautiful poem, one verse reads,

Every moment dies a man,

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Every moment one is born.

... If this were true, the population of the world would be at a standstill. In truth, the rate of birth is slightly in excess of that of death. I would suggest [that the next version of your poem should read]:

Every moment dies a man, Every moment 1 1/16 is born.

Strictly speaking, the actual figure is so long I cannot get it into a line, but I believe the figure 1 1/16 will be sufficiently accurate for poetry."[42]

Quotations

On two occasions I have been asked, – "Pray, Mr. Babbage, if you put into the machine wrong figures, will the right “ answers come out?" In one case a member of the Upper, and in the other a member of the Lower House put this question. I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question.[43] ”

(see Garbage In, Garbage Out for a more modern take on this)

"A tool is usually more simple than a machine; it is generally used with the hand, whilst a machine is frequently moved by animal or steam power." "Errors using inadequate data are much less than those using no data at all." "Telegraphs are machines for conveying information over extensive lines with great rapidity." "The difference between a tool and a machine is not capable of very precise distinction; nor is it necessary, in a popular explanation of those terms, to limit very strictly their acceptation." "The economy of human time is the next advantage of machinery in manufactures." "Another age must be the judge," after his failure to build his Difference Engine design[44]

Commemoration

Babbage has been commemorated by a number of references, as shown on this list. In particular, the crater Babbage on the Moon, and the Charles Babbage Institute, an information technology archive and research center at the University of Minnesota, were named after him. The large Babbage lecture theatre at Cambridge University, used for undergraduate science lectures, commemorates his time at the university.

British Rail named a locomotive after him in the 1990s as part of a program of naming locomotives after famous and significant scientists. The University of Plymouth commemorates Charles Babbage with the Babbage building, the University's school of computing is based here. The IT Service of Cambridgeshire County Council is based in Babbage House on the Castle Park office complex, Cambridge. Also, in Monk's Walk School, there is a block called "Babbage" to commemorate his work in the world of science. In Chessington, in the Royal Borough of Kingston upon Thames, a road in a new housing development has been named Charles Babbage Close. The Babbage programming language for GEC 4000 series minicomputers is named after him. Charles Babbage appears as a Great Thinker in the 2008 strategy video game Civilization Revolution.[45] Babbage frequently appears in steampunk works (the enumeration of which would be an exhausting effort), where he does build the Difference Engine, spurring on Victorian Era computer science.

Publications

Babbage, Charles (1826). A Comparative View of the Various Institutions for the Assurance of Lives (http://books.google.com /books?id=teGjS4XfpbMC&printsec=frontcover&dq=charles+babbage&as_brr=1#PPR1,M2) . London: J. Mawman. http://books.google.com/books?id=teGjS4XfpbMC&printsec=frontcover&dq=charles+babbage&as_brr=1#PPR1,M2. Babbage, Charles (1830). Reflections on the Decline of Science in England, and on Some of Its Causes (http://books.google.com /books?id=3bgPAAAAMAAJ&printsec=frontcover&dq=charles+babbage&as_brr=1#PPR1,M2) . London: B. Fellowes. http://books.google.com/books?id=3bgPAAAAMAAJ&printsec=frontcover&dq=charles+babbage&as_brr=1#PPR1,M2. Babbage, Charles (1835). On the Economy of Machinery and Manufactures (http://books.google.com/books?id=wUQeMa0MFnkC& printsec=frontcover&dq=charles+babbage&as_brr=1#PPR1,M2) (4 ed.). London: Charles Knight. http://books.google.com /books?id=wUQeMa0MFnkC&printsec=frontcover&dq=charles+babbage&as_brr=1#PPR1,M2. Babbage, Charles (1837). The Ninth Bridgewater Treatise, a Fragment (http://books.google.com/books?id=RlgEAAAAQAAJ& printsec=frontcover&dq=charles+babbage&as_brr=1#PPP7,M2) . London: John Murray. http://books.google.com /books?id=RlgEAAAAQAAJ&printsec=frontcover&dq=charles+babbage&as_brr=1#PPP7,M2. (reissued by Cambridge University Press 2009, ISBN 978-1-108-00000-0) Babbage, Charles (1841). Table of the Logarithms of the Natural Numbers from 1 to 108000 (http://books.google.com /books?id=teMGAAAAYAAJ&printsec=frontcover&dq=charles+babbage&as_brr=1#PPT8,M2) . London: William Clowes and Sons. http://books.google.com/books?id=teMGAAAAYAAJ&printsec=frontcover&dq=charles+babbage&as_brr=1#PPT8,M2. Babbage, Charles (1851). The Exposition of 1851 (http://books.google.com/books?id=NZcBAAAAQAAJ&printsec=frontcover& dq=charles+babbage&as_brr=1#PPR3,M2) . London: John Murray. http://books.google.com/books?id=NZcBAAAAQAAJ& printsec=frontcover&dq=charles+babbage&as_brr=1#PPR3,M2. Babbage, Charles (1864). Passages from the Life of a Philosopher (http://books.google.com/books?id=2T0AAAAAQAAJ& printsec=frontcover&dq=charles+babbage&as_brr=1#PPR3,M2) . London: Longman. http://books.google.com /books?id=2T0AAAAAQAAJ&printsec=frontcover&dq=charles+babbage&as_brr=1#PPR3,M2. Babbage, Charles. Science and Reform. Selected Works of Charles Babbage; edited by Anthony Hyman; Cambridge University

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Press,

References

1. ^ Hook, Diana H.; Jeremy M. Norman, Michael R. Williams (2002). subscription required Origins of cyberspace: a library on the history of computing, 20. ^ "Postmortem report by John Gregory Smith, F.R.C.S. (anatomist)" networking, and telecommunications (http://books.google.com (http://www.scienceandsociety.co.uk /books?id=fsICrp9shVIC&pg=PA165) . Norman Publishing. pp. 161, /results.asp?X9=BABBAGE,%20CHARLES) . Science and 165. ISBN 0930405854. http://books.google.com society.co.UK. http://www.scienceandsociety.co.uk /books?id=fsICrp9shVIC&pg=PA165. /results.asp?X9=BABBAGE,%20CHARLES. Retrieved 29 January 2009. 2. ^ GRO Register of Deaths: December 1871 1a 383 MARYLEBONE – 21. ^ "Babbage's brain" (http://blogtobelet.blogspot.com/) . Charles Babbage, aged 79 Blogtobelet.blogspot.com. http://blogtobelet.blogspot.com/. Retrieved 3. ^ Tanenbaum, Andrew (2007). Modern Operating Systems. Prentice 29 January 2009. Hall. p. 7. ISBN 0136006639. 22. ^ "Babbage's brain" (http://www.danyey.co.uk/london.php) . 4. ^ Halacy, Daniel Stephen (1970). Charles Babbage, Father of the www.DanYEY.co.uk. http://www.danyey.co.uk/london.php. Retrieved Computer. Crowell-Collier Press. ISBN 0027413705. Others can be 29 January 2009. regarded as having a claim on this title, such as Konrad Zuse, John 23. ^ "Overview – The Babbage Engine | Computer History Museum" Vincent Atanasoff or Alan Turing. (http://www.computerhistory.org/babbage/) . Computerhistory.org. 5. ^ Hyman, Anthony (1982). Charles Babbage, Pioneer of the Computer. http://www.computerhistory.org/babbage/. Retrieved 29 January 2009. Princeton University Press. p. 5. 24. ^ Shiels, Maggie (10 May 2008). "Victorian 'supercomputer' is reborn" 6. ^ Moseley, Maboth (1964). Irascible Genius, The Life of Charles (http://news.bbc.co.uk/2/hi/technology/7391593.stm) . BBC News. Babbage. Chicago: Henry Regnery Company. p. 29. http://news.bbc.co.uk/2/hi/technology/7391593.stm. Retrieved 11 May 7. ^ "The Late Mr. Charles Babbage, F.R.S.". The Times. 2008. 8. ^ Moseley, Maboth (1964). Irascible Genius, The Life of Charles 25. ^ Fuegi J, Francis J (October–December 2003). "Lovelace & Babbage Babbage. Chicago: Henry Regnery Company. p. 39. and the creation of the 1843 'notes'". Annals of the History of 9. ^ a b Babbage, Charles (http://venn.lib.cam.ac.uk/cgi-bin Computing 25 (4): 16–26. doi:10.1109/MAHC.2003.1253887 /search.pl?sur=&suro=c&fir=&firo=c&cit=&cito=c&c=all& (http://dx.doi.org/10.1109%2FMAHC.2003.1253887) . See pages 19, tex=BBG810C&sye=&eye=&col=all&maxcount=50) in Venn, J. & J. 25 A., Alumni Cantabrigienses, Cambridge University Press, 10 vols, 26. ^ Karp, Tony. "Babbage – The language of the future" (http://www.tlc- 1922–1958. systems.com/babbage.htm) . http://www.tlc-systems.com 10. ^ Wilkes (2002) p.355 /babbage.htm. Retrieved 11 May 2008. 11. ^ Hofstadter, Douglas R. (1979, 2000). Gödel, Escher, Bach: an 27. ^ "Electronics Times: Micro-machines are fit for space" Eternal Golden Braid. Penguin Books. pp. 726. (http://findarticles.com/p/articles/mi_m0WVI/is_1999_Oct_11 12. ^ "Charles Babbage'S Computer Engines" (http://www.allsands.com /ai_56912203/print) . Findarticles.com. 11 October 1999. /History/Objects/babbagecomputer_yy_gn.htm) . http://findarticles.com/p/articles/mi_m0WVI/is_1999_Oct_11 http://www.allsands.com/History/Objects /ai_56912203/print. Retrieved 29 January 2009. /babbagecomputer_yy_gn.htm. Retrieved 13 May 2010. 28. ^ Babbage's Last Laugh (http://www.economist.com/diversions 13. ^ "Attraction information for Dudmaston Hall: VisitBritain" /millennium/displaystory.cfm?story_id=E1_PNQGVQ) (requires paid (http://www.visitbritain.co.uk/Attraction/Bridgnorth/Historic-House- subscription) or-Palace/157092/Dudmaston-Hall.htm) . VisitBritain. 29. ^ Kahn, David L. (1996). The Codebreakers: The Story of Secret http://www.visitbritain.co.uk/Attraction/Bridgnorth/Historic-House- Writing. New York: Scribner. ISBN 978-0-684-83130-5. or-Palace/157092/Dudmaston-Hall.htm. Retrieved 29 January 2009. 30. ^ Babbage, Charles – "Passages from the Life of a Philosopher", page 14. ^ Valerie Bavidge-Richardson. "Babbage Family Tree 2005" 317-318. (http://books.google.com/books?id=2T0AAAAAQAAJ& (http://www.bavidge.co.uk printsec=frontcover&dq=charles+babbage&as_brr=1#PPR3,M2) . /Babbage%20Family%20Tree%202005,%20InternetTree http://books.google.com/books?id=2T0AAAAAQAAJ& /wc03/wc03_074.htm) . http://www.bavidge.co.uk printsec=frontcover&dq=charles+babbage&as_brr=1#PPR3,M2. /Babbage%20Family%20Tree%202005,%20InternetTree 31. ^ "Babbage, Benjamin Herschel – Bright Sparcs Biographical entry" /wc03/wc03_074.htm. Retrieved 22 October 2007. (http://www.asap.unimelb.edu.au/bsparcs/biogs/P000074b.htm) . 15. ^ "Henry Prevost Babbage – The Babbage Engine | Computer History http://www.asap.unimelb.edu.au/bsparcs/biogs/P000074b.htm. Museum" (http://www.computerhistory.org/babbage/henrybabbage/) . Retrieved 15 May 2008. Computerhistory.org. http://www.computerhistory.org/babbage 32. ^ "Medical Discoveries, Ophthalmoscope" /henrybabbage/. Retrieved 29 January 2009. (http://www.discoveriesinmedicine.com/Ni-Ra/Ophthalmoscope.html) . 16. ^ "Home – Henry Babbage's Analytical Engine Mill, 1910" Discoveriesinmedicine.com. http://www.discoveriesinmedicine.com (http://www.sciencemuseum.org.uk/objects /Ni-Ra/Ophthalmoscope.html. Retrieved 29 January 2009. /computing_and_data_processing/1896-58.aspx) . Science Museum. 16 33. ^ Crowther, J. G. (1968). Scientific Types. London: Barrie & Rockliff. January 2007. http://www.sciencemuseum.org.uk/objects p. 266. ISBN 0248997297. /computing_and_data_processing/1896-58.aspx. Retrieved 29 January 34. ^ Hyman Anthony (1982). Charles Babbage, Pioneer of the Computer. 2009. Princeton, New Jersey: Princeton University Press. pp. 82–7. 17. ^ Horsley, Victor (1909). "Description of the Brain of Mr. Charles ISBN 0691083037. Babbage, F.R.S" (http://journals.royalsociety.org/content 35. ^ Moseley (1964). Irascible Genius, The Life of Charles Babbage. /xl7210623532p738/?p=daaddfe06dca444eafad36aab95177ea&pi=1) Chicago: Henery Regnery. pp. 120–1.- Note some confusion as to the . Philosophical Transactions of the Royal Society of London. Series B, dates. Containing Papers of a Biological Character 200: 117–132. 36. ^ Babbage, Charles (1857). "Table of the Relative Frequency of doi:10.1098/rstb.1909.0003 (http://dx.doi.org Occurrence of the Causes of Breaking of Plate Glass Windows". /10.1098%2Frstb.1909.0003) . http://journals.royalsociety.org/content Mechanics Magazine 66: 82. /xl7210623532p738/?p=daaddfe06dca444eafad36aab95177ea&pi=1. 37. ^ Babbage, Charles (1989). Martin Campbell-Kelly. ed. The Works of Retrieved 7 December 2007.- subscription required Charles Babbage. V. London: William Pickering. p. 137. 18. ^ Babbage, Neville (June 1991). "Autopsy Report on the Body of ISBN 1851960058. Charles Babbage ("the father of the computer")". Medical Journal of 38. ^ See this web site (http://books.google.com Australia 154 (11): 758–9. PMID 2046574 /books?vid=OCLC05633593&id=cScKAAAAIAAJ&pg=PA417& (http://www.ncbi.nlm.nih.gov/pubmed/2046574) . lpg=PA417& 19. ^ Williams, Michael R. (1998). "The "Last Word" on Charles Babbage" dq=Table+of+the+Relative+Frequency+of+the+Causes+of+Breakage+ (http://www2.computer.org/portal/web/csdl/doi/10.1109/85.728225) . for Babbage's table of causes of broken glass panes. IEEE Annals of the History of Computing 20: 10–4. 39. ^ Campbell-Kelly, Martin; Babbage, Charles (1994). "Ch 26". Passages doi:10.1109/85.728225 (http://dx.doi.org/10.1109%2F85.728225) . from the Life of a Philosopher. Pickering & Chatto Publishers. p. 342. http://www2.computer.org/portal/web/csdl/doi/10.1109/85.728225. – ISBN 1-85196-040-6.

6 of 7 Sunday 16 May 2010 12:49 PM Charles Babbage - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Charles_Babbage

40. ^ Passages from the life of a philosopher By Charles Babbage; p360 Vic: Viking Penguin. p. 77. ISBN 0-14-200144-9. 41. ^ Hansard's parliamentary debates. THIRD SERIES COMMENCING 43. ^ Campbell-Kelly, Martin; Babbage, Charles (1994). "V Difference WITH THE ACCESSION OF WILLIAM IV. 27° & 28° VICTORIA, 1864. Engine No. 1". Passages from the Life of a Philosopher. Pickering & VOL. CLXXVI. COMPRISING THE PERIOD FROM THE TWENTY-FIRST Chatto Publishers. p. 67. ISBN 1-85196-040-6. DAY OF JUNE 1864, TO THE TWENTY-NINTH DAY OF JULY 1864. 44. ^ Sydell, Laura. "A 19th-Century Mathematician Finally Proves Himself" Parliament, Thomas Curson Hansard "Street Music (Metropolis) Bill"; (http://www.npr.org/templates/story/story.php?storyId=121206408& V4, p471 [1] (http://books.google.com/books?id=dugT3_K- sc=fb&cc=fp) . National Public Radio. http://www.npr.org/templates 1ZIC&pg=PA469&dq=hoop+trundling+nuisance&num=50& /story/story.php?storyId=121206408&sc=fb&cc=fp. cd=38#v=onepage&q=trundling&f=false) 45. ^ Civilization Revolution: Great People (http://www.civfanatics.com 42. ^ Babbage, Charles; Swade, Doron (2001). The difference engine: /civrev/great_people) "CivFanatics" Retrieved on 3 September 2009 Charles Babbage and the quest to build the first computer. Ringwood,

External links

Babbage (http://www.sciencemuseum.org.uk/onlinestuff/stories/babbage.aspx) Science Museum, London. Description of Babbage's calculating machine projects and the Science Museum's study of Babbage's works, including modern reconstruction and model- building projects. Charles Babbage (http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Babbage.html) Mr. Charles Babbage (http://books.google.com/books?id=0CMYAAAAMAAJ&pg=PA57&dq=charles+babbage& as_brr=1#PPA57,M2) – obituary from The Times (1871) The Babbage Pages (http://www.projects.ex.ac.uk/babbage/) The Babbage Difference Engine (http://www.satyam.com.ar/Babbage/en/index.html) – an overview of how it works. "On a Method of Expressing by Signs the Action of Machinery" (http://historical.library.cornell.edu/kmoddl/toc_babbage1.html) , 1826. – Original edition Archival material relating to Charles Babbage (http://www.nationalarchives.gov.uk/nra/searches/subjectView.asp?ID=P1076) listed at the UK National Register of Archives Charles Babbage (http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=12433) at Find a Grave Charles Babbage Institute (http://www.cbi.umn.edu/about/babbage.html) – pages on "Who Was Charles Babbage?" including biographical note, description of Difference Engine No. 2, publications by Babbage, archival and published sources on Babbage, sources on Babbage and Ada Lovelace. Retrieved from "http://en.wikipedia.org/wiki/Charles_Babbage" Categories: 1791 births | 1871 deaths | Alumni of Peterhouse, Cambridge | Alumni of Trinity College, Cambridge | Burials at Kensal Green Cemetery | Computer pioneers | English engineers | English mathematicians | English philosophers | English Christians | Fellows of the Royal Society of Edinburgh | Fellows of the Royal Society | Lucasian Professors of Mathematics | Recipients of the Gold Medal of the Royal Astronomical Society | Cambridge mathematicians

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