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101 Born, Ignaz Edler von
[br]b. 26 December 1742 Karlsburg, Transylvania (now Alba lulia, Romania)d. 24 July 1791 Vienna, Austria[br]Austrian metallurgical and mining expert, inventor of the modern amalgamation process.[br]At the University of Prague he studied law, but thereafter turned to mineralogy, physics and different aspects of mining. In 1769–70 he worked with the mining administration in Schemnitz (now Banská Stiavnica, Slovakia) and Prague and later continued travelling to many parts of Europe, with special interests in the mining districts. In 1776, he was charged to enlarge and systematically to reshape the natural-history collection in Vienna. Three years later he was appointed Wirklicher Hofrat at the mining and monetary administration of the Austrian court.Born, who had been at a Jesuit college in his youth, was an active freemason in Vienna and exercised remarkable social communication. The intensity of his academic exchange was outstanding, and he was a member of more than a dozen learned societies throughout Europe. When with the construction of a new metallurgic plant at Joachimsthal (now Jáchymov, Czech Republic) the methods of extracting silver and gold from ores by the means of quicksilver demanded acute consideration, it was this form of scientific intercourse that induced him in 1786 to invite many of his colleagues from several countries to meet in Schemnitz in order to discuss his ideas. Since the beginnings of the 1780s Born had developed the amalgamation process as had first been applied in Mexico in 1557, by mixing the roasted and chlorinated ores with water, ingredients of iron and quicksilver in drums and having the quicksilver refined from the amalgam in the next step. The meeting led to the founding of the Societät der Bergbaukunde, the first internationally structured society of scientists in the world. He died as the result of severe injuries suffered in an accident while he was studying fire-setting in a Slovakian mine in 1770.[br]Bibliography1772–5, Lithophylacium Borniarum seu Index fossilium, 2 vols, Prague.1774 (ed.), Briefe an J.J.Ferber über mineralogische Gegenstände, Frankfurt and Leipzig.1775–84, Abhandlungen einer Privatgesellschaft in Böhmen, zur Aufnahme derMathematik, der vaterländischen Geschichte und der Naturgeschichte, 6 vols, Prague. 1786, Über das Anquicken der gold-und silberhaltigen Erze, Rohsteine, Schwarzkupferund Hüttenspeise, Vienna.1789–90, co-edited with F.W.H.von Trebra, Bergbaukunde, 2 vols, Leipzig.Further ReadingC.von Wurzbach, 1857, Biographisches Lexikon des Kaiserthums Österreich, Vol. II, pp. 71–4.L.Molnár and A Weiß, 1986, Ignaz Edler von Born und die Societät der Bergbaukunde 1786, Vienna: Bundesministerium für Handel, Gewerbe und Industrie (provides a very detailed description of his life, the amalgamation process and the society of 1786). G.B.Fettweis, and G.Hamann (eds), 1989, Über Ignaz von Born und die Societät derBergbaukunde, Vienna: Verlag der Österreichischen Akademie der Wissenschaft (provides a very detailed description).WK -
102 Darby, Abraham
SUBJECT AREA: Metallurgy[br]b. 1678 near Dudley, Worcestershire, Englandd. 5 May 1717 Madely Court, Coalbrookdale, Shropshire, England[br]English ironmaster, inventor of the coke smelting of iron ore.[br]Darby's father, John, was a farmer who also worked a small forge to produce nails and other ironware needed on the farm. He was brought up in the Society of Friends, or Quakers, and this community remained important throughout his personal and working life. Darby was apprenticed to Jonathan Freeth, a malt-mill maker in Birmingham, and on completion of his apprenticeship in 1699 he took up the trade himself in Bristol. Probably in 1704, he visited Holland to study the casting of brass pots and returned to Bristol with some Dutch workers, setting up a brassworks at Baptist Mills in partnership with others. He tried substituting cast iron for brass in his castings, without success at first, but in 1707 he was granted a patent, "A new way of casting iron pots and other pot-bellied ware in sand without loam or clay". However, his business associates were unwilling to risk further funds in the experiments, so he withdrew his share of the capital and moved to Coalbrookdale in Shropshire. There, iron ore, coal, water-power and transport lay close at hand. He took a lease on an old furnace and began experimenting. The shortage and expense of charcoal, and his knowledge of the use of coke in malting, may well have led him to try using coke to smelt iron ore. The furnace was brought into blast in 1709 and records show that in the same year it was regularly producing iron, using coke instead of charcoal. The process seems to have been operating successfully by 1711 in the production of cast-iron pots and kettles, with some pig-iron destined for Bristol. Darby prospered at Coalbrookdale, employing coke smelting with consistent success, and he sought to extend his activities in the neighbourhood and in other parts of the country. However, ill health prevented him from pursuing these ventures with his previous energy. Coke smelting spread slowly in England and the continent of Europe, but without Darby's technological breakthrough the ever-increasing demand for iron for structures and machines during the Industrial Revolution simply could not have been met; it was thus an essential component of the technological progress that was to come.Darby's eldest son, Abraham II (1711–63), entered the Coalbrookdale Company partnership in 1734 and largely assumed control of the technical side of managing the furnaces and foundry. He made a number of improvements, notably the installation of a steam engine in 1742 to pump water to an upper level in order to achieve a steady source of water-power to operate the bellows supplying the blast furnaces. When he built the Ketley and Horsehay furnaces in 1755 and 1756, these too were provided with steam engines. Abraham II's son, Abraham III (1750–89), in turn, took over the management of the Coalbrookdale works in 1768 and devoted himself to improving and extending the business. His most notable achievement was the design and construction of the famous Iron Bridge over the river Severn, the world's first iron bridge. The bridge members were cast at Coalbrookdale and the structure was erected during 1779, with a span of 100 ft (30 m) and height above the river of 40 ft (12 m). The bridge still stands, and remains a tribute to the skill and judgement of Darby and his workers.[br]Further ReadingA.Raistrick, 1989, Dynasty of Iron Founders, 2nd edn, Ironbridge Gorge Museum Trust (the best source for the lives of the Darbys and the work of the company).H.R.Schubert, 1957, History of the British Iron and Steel Industry AD 430 to AD 1775, London: Routledge \& Kegan Paul.LRD -
103 Maudslay, Henry
SUBJECT AREA: Mechanical, pneumatic and hydraulic engineering[br]b. 22 August 1771 Woolwich, Kent, Englandd. 15 February 1831 Lambeth, London, England[br]English precision toolmaker and engineer.[br]Henry Maudslay was the third son of an ex-soldier and storekeeper at Woolwich Arsenal. At the age of 12 he was employed at the Arsenal filling cartridges; two years later he was transferred to the woodworking department, adjacent to the smithy, to which he moved when 15 years old. He was a rapid learner, and three years later Joseph Bramah took him on for the construction of special tools required for the mass-production of his locks. Maudslay was thus employed for the next eight years. He became Bramah's foreman, married his housekeeper, Sarah Tindale, and, unable to better himself, decided to leave and set up on his own. He soon outgrew his first premises in Wells Street and moved to Margaret Street, off Oxford Street, where some examples of his workmanship were displayed in the window. These caught the attention of a visiting Frenchman, de Bacquancourt; he was a friend of Marc Isambard Brunel, who was then in the early stages of designing the block-making machinery later installed at Portsmouth dockyard.Brunel wanted first a set of working models, as he did not think that the Lords of the Admiralty would be capable of understanding engineering drawings; Maudslay made these for him within the next two years. Sir Samuel Bentham, Inspector-General of Naval Works, agreed that Brunel's system was superior to the one that he had gone some way in developing; the Admiralty approved, and an order was placed for the complete plant. The manufacture of the machinery occupied Maudslay for the next six years; he was assisted by a draughtsman whom he took on from Portsmouth dockyard, Joshua Field (1786–1863), who became his partner in Maudslay, Son and Field. There were as many as eighty employees at Margaret Street until, in 1810, larger premises became necessary and a new works was built at Lambeth Marsh where, eventually, there were up to two hundred workers. The new factory was flanked by two houses, one of which was occupied by Maudslay, the other by Field. The firm became noted for its production of marine steam-engines, notably Maudslay's table engine which was first introduced in 1807.Maudslay was a consummate craftsman who was never happier than when working at his bench or at a machine tool; he was also one of the first engineers to appreciate the virtues of standardization. Evidence of this appreciation is to be found in his work in the development of the Bramah lock and then on the machine tools for the manufacture of ship's blocks to Marc Brunel's designs; possibly his most important contribution was the invention in 1797 of the metal lathe. He made a number of surface plates of the finest quality. The most celebrated of his numerous measuring devices was a micrometer-based machine which he termed his "Lord Chancellor" because, in the machine shop, it represented the "final court of appeal", measuring to one-thousandth of an inch.[br]Further Reading1934–5, "Maudslay, Sons \& Field as general engineers", Transactions of the Newcomen Society 15, London.1963, Engineering Heritage, Vol. 1, London: Institution of Mechanical Engineers. L.T.C.Rolt, 1965, Tools for the Job, London: Batsford.W.Steeds, 1969, A History of Machine Tools 1700–1910, Oxford: Oxford University Press.IMcN -
104 Scheutz, George
SUBJECT AREA: Electronics and information technology[br]b. 23 September 1785 Jonkoping, Swedend. 27 May 1873 Stockholm, Sweden[br]Swedish lawyer, journalist and self-taught engineer who, with his son Edvard Raphael Scheutz (b. 13 September 1821 Stockholm, Sweden; d. 28 January 1881 Stockholm, Sweden) constructed a version of the Babbage Difference Engine.[br]After early education at the Jonkoping elementary school and the Weixo Gymnasium, George Scheutz entered the University of Lund, gaining a degree in law in 1805. Following five years' legal work, he moved to Stockholm in 1811 to work at the Supreme Court and, in 1814, as a military auditor. In 1816, he resigned, bought a printing business and became editor of a succession of industrial and technical journals, during which time he made inventions relating to the press. It was in 1830 that he learned from the Edinburgh Review of Babbage's ideas for a difference engine and started to make one from wood, pasteboard and wire. In 1837 his 15-yearold student son, Edvard Raphael Scheutz, offered to make it in metal, and by 1840 they had a working machine with two five-digit registers, which they increased the following year and then added a printer. Obtaining a government grant in 1851, by 1853 they had a fully working machine, now known as Swedish Difference Engine No. 1, which with an experienced operator could generate 120 lines of tables per hour and was used to calculate the logarithms of the numbers 1 to 10,000 in under eighty hours. This was exhibited in London and then at the Paris Great Exhibition, where it won the Gold Medal. It was subsequently sold to the Dudley Observatory in Albany, New York, for US$5,000 and is now in a Chicago museum.In England, the British Registrar-General, wishing to produce new tables for insurance companies, and supported by the Astronomer Royal, arranged for government finance for construction of a second machine (Swedish Difference Engine No. 2). Comprising over 1,000 working parts and weighing 1,000 lb (450 kg), this machine was used to calculate over 600 tables. It is now in the Science Museum.[br]Principal Honours and DistinctionsMember of the Swedish Academy of Sciences, Paris Exhibition Medal of Honour (jointly with Edvard) 1856. Annual pension of 1,200 marks per annum awarded by King Carl XV 1860.Bibliography1825, "Kranpunpar. George Scheutz's patent of 14 Nov 1825", Journal for Manufacturer och Hushallning 8.1855, with E.S.Scheutz, Machine à calcul qui présente les résultats en les imprimantellemême, Stockholm.Further ReadingR.C.Archibald, 1947, "P.G.Scheutz, publicist, author, scientific mechanic and Edvard Scheutz, engineer. Biography and Bibliography", MTAC 238.U.C.Merzbach, 1977, "George Scheutz and the first printing calculator", SmithsonianStudies in History and Technology 36:73.M.Lindgren, 1990, Glory and Failure (the Difference Engines of Johan Muller, Charles Babbage and George \& Edvard Scheutz), Cambridge, Mass.: MIT Press.KF
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