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41 Ercker, Lazarus
[br]b. c.1530 Annaberg, Saxony, Germanyd. 1594 Prague, Bohemia[br]German chemist and metallurgist.[br]Educated at Wittenberg University during 1547–8, Ercker obtained in 1554, through one of his wife's relatives, the post of Assayer from the Elector Augustus at Dresden. From then on he took a succession of posts in mining and metallurgy. In 1555 he was Chief Consultant and Supervisor of all matters relating to mines, but for some unknown reason was demoted to Warden of the Mint at Annaberg. In 1558 he travelled to the Tyrol to study the mines in that region, and in the same year Prince Henry of Brunswick appointed him Warden, then Master, of the Mint at Goslar. Ercker later moved to Prague where, through another of his wife's relatives, he was appointed Control Tester at Kutna Hora. It was there that he wrote his best-known book, Die Beschreibung allfürnemisten mineralischen Ertz, which drew him to the attention of the Emperor Maximilian, who made him Courier for Mining and a clerk of the Supreme Court of Bohemia. The next Emperor, Rudolf II, a noted patron of science and alchemy, promoted Ercker to Chief Inspector of Mines and ennobled him in 1586 with the title Von Schreckenfels'. His second wife managed the mint at Kutna Hora and his two sons became assayers. These appointments gained him much experience of the extraction and refining of metals. This first bore fruit in a book on assaying, Probierbüchlein, printed in 1556, followed by one on minting, Münzbuch, in 1563. His main work, Die Beschreibung, was a systematic review of the methods of obtaining, refining and testing the alloys and minerals of gold, silver, copper, antimony, mercury and lead. The preparation of acids, salts and other compounds is also covered, and his apparatus is fully described and illustrated. Although Ercker used Agricola's De re metattica as a model, his own work was securely based on his practical experience. Die Beschreibung was the first manual of analytical and metallurgical chemistry and influenced later writers such as Glauber on assaying. After the first edition in Prague came four further editions in Frankfurt-am-Main.[br]BibliographyDie Beschreibung allfürnemisten mineralischen Ertz, Prague. 1556, Probierbuchlein.1563, Munzbuch.Further ReadingP.R.Beierlein, 1955, Lazarus Ercker, Bergmann, Hüttenmann und Münzmeister im 16. Jahrhundert, Berlin (the best biography, although the chemical details are incomplete).J.R.Partington, 1961, History of Chemistry, London, Vol. II, pp. 104–7.E.V.Armstrong and H.Lukens, 1939, "Lazarus Ercker and his Probierbuch", J.Chem. Ed.16: 553–62.LRD -
42 Sarnoff, David
[br]b. 27 February 1891 Uzlian, Minsk (now in Belarus)d. 12 December 1971 New York City, New York, USA[br]Russian/American engineer who made a major contribution to the commercial development of radio and television.[br]As a Jewish boy in Russia, Sarnoff spent several years preparing to be a Talmudic Scholar, but in 1900 the family emigrated to the USA and settled in Albany, New York. While at public school and at the Pratt Institute in Brooklyn, New York, he helped the family finances by running errands, selling newspapers and singing the liturgy in the synagogue. After a short period as a messenger boy with the Commercial Cable Company, in 1906 he became an office boy with the Marconi Wireless Telegraph Company of America (see G. Marconi). Having bought a telegraph instrument with his first earnings, he taught himself Morse code and was made a junior telegraph operator in 1907. The following year he became a wireless operator at Nantucket Island, then in 1909 he became Manager of the Marconi station at Sea Gate, New York. After two years at sea he returned to a shore job as wireless operator at the world's most powerful station at Wanamaker's store in Manhattan. There, on 14 April 1912, he picked up the distress signals from the sinking iner Titanic, remaining at his post for three days.Rewarded by rapid promotion (Chief Radio Inspector 1913, Contract Manager 1914, Assistant Traffic Manager 1915, Commercial Manager 1917) he proposed the introduction of commercial radio broadcasting, but this received little response. Consequently, in 1919 he took the job of Commercial Manager of the newly formed Radio Corporation of America (RCA), becoming General Manager in 1921, Vice- President in 1922, Executive Vice-President in 1929 and President in 1930. In 1921 he was responsible for the broadcasting of the Dempsey-Carpentier title-fight, as a result of which RCA sold $80 million worth of radio receivers in the following three years. In 1926 he formed the National Broadcasting Company (NBC). Rightly anticipating the development of television, in 1928 he inaugurated an experimental NBC television station and in 1939 demonstrated television at the New York World Fair. Because of his involvement with the provision of radio equipment for the armed services, he was made a lieutenant-colonel in the US Signal Corps Reserves in 1924, a full colonel in 1931 and, while serving as a communications consultant to General Eisenhower during the Second World War, Brigadier General in 1944.With the end of the war, RCA became a major manufacturer of television receivers and then invested greatly in the ultimately successful development of shadowmask tubes and receivers for colour television. Chairman and Chief Executive from 1934, Sarnoff held the former post until his retirement in 1970.[br]Principal Honours and DistinctionsFrench Croix de Chevalier d'honneur 1935, Croix d'Officier 1940, Croix de Commandant 1947. Luxembourg Order of the Oaken Crown 1960. Japanese Order of the Rising Sun 1960. US Legion of Merit 1946. UN Citation 1949. French Union of Inventors Gold Medal 1954.KFSee also: Zworykin, Vladimir Kosma -
43 Theophilus Presbyter
[br]fl. late eleventh/early twelfth century[br]German author of the most detailed medieval treatise relating to technology.[br]The little that is known of Theophilus is what can be inferred from his great work, De diversis artibus. He was a Benedictine monk and priest living in north-west Germany, probably near an important art centre. He was an educated man, conversant with scholastic philosophy and at the same time a skilled, practising craftsman. Even his identity is obscure: Theophilus is a pseudonym, possibly for Roger of Helmarshausen, for the little that is known of both is in agreement.Evidence in De diversis suggests that it was probably composed during 1110 to 1140. White (see Further Reading) goes on to suggest late 1122 or early 1123, on the grounds that Theophilus only learned of St Bernard of Clairvaulx's diatribe against lavish church ornamentation during the writing of the work, for it is only in the preface to Book 3 that Theophilus seeks to justify his craft. St Bernard's Apologia can be dated late 1122. No other medieval work on art combines the comprehensive range, orderly presentation and attention to detail as does De diversis. It has been described as an encyclopedia of medieval skills and crafts. It also offers the best and often the only description of medieval technology, including the first direct reference to papermaking in the West, the earliest medieval account of bell-founding and the most complete account of organ building. Many metallurgical techniques are described in detail, such as the making of a crucible furnace and bloomery hearth.The treatise is divided into three books, the first on the materials and art of painting, the second on glassmaking, including stained glass, glass vessels and the blown-cylinder method for flat glass, and the final and longest book on metalwork, including working in iron, copper, gold and silver for church use, such as chalices and censers. The main texts are no mere compilations, but reveal the firsthand knowledge that can only be gained by a skilled craftsman. The prefaces to each book present perhaps the only medieval expression of an artist's ideals and how he sees his art in relation to the general scheme of things. For Theophilus, his art is a gift from God and every skill an act of praise and piety. Theophilus is thus an indispensable source for medieval crafts and technology, but there are indications that the work was also well known at the time of its composition and afterwards.[br]BibliographyThe Wolfenbuttel and Vienna manuscripts of De diversis are the earliest, both dating from the first half of the twelfth century, while the British Library copy, in an early thirteenth-century hand, is the most complete. Two incomplete copies from the thirteenth century held at Cambridge and Leipzig offer help in arriving at a definitive edition.There are several references to De diversis in sixteenth-century printed works, such as Cornelius Agrippa (1530) and Josias Simmler (1585). The earliest printed edition ofDe diversis was prepared by G.H.Lessing in 1781 with the title, much used since, Diversarium artium schedula.There are two good recent editions: Theophilus: De diversis artibus. The Various Arts, 1964, trans. with introd. by C.R.Dodwell, London: Thomas Nelson, and On Diverse Arts. The Treatise of Theophilus, 1963, trans. with introd. and notes by J.G.Harthorne and C.S.Smith, Chicago University Press.Further ReadingLynn White, 1962, "Theophilus redivivus", Technology and Culture 5:224–33 (a comparative review of Theophilus (op. cit.) and On Diverse Arts (op. cit.)).LRD -
44 Young, Arthur
SUBJECT AREA: Agricultural and food technology[br]b. 11 September 1741 London, Englandd. 20 April 1820 Bradford, England[br]English writer and commentator on agricultural affairs; founder and Secretary of the Board of Agriculture (later the Ministry of Agriculture, Fisheries and Food).[br]He was the youngest of the three children of Dr Arthur Young, who was at one time Chaplain to the Speaker of the House of Commons. He learned Latin and Greek at Lavenham School, and at the age of 17 was apprenticed to a mercantile house, an occupation he disliked. He first published The Theatre of the Present War in North America in 1758. He then wrote four novels and began to produce the literary magazine The Universal Museum. After his father's death he returned home to manage his father's farm, and in 1765 he married Martha Allen.Young learned farming by experiment, and three years after his return he took over the rent of a 300 acre farm, Samford Hall in Essex. He was not a practical farmer, and was soon forced to give it up in favour of one of 100 acres (40.5 hectares) in Hertfordshire. He subsidized his farming with his writing, and in 1768 published The Farmer's Letters to the People of England. The first of his books on agricultural tours, Six Weeks Tours through the Counties of England and Wales, was published in 1771. Between 1784 and 1809 he published the Annals of Agriculture, one of whose contributors was George III, who wrote under the pseudonym of Ralph Robinson.By this time he was corresponding with all of influence in agricultural matters, both at home and abroad. George Washington wrote frequently to Young, and George III was reputed to travel always with a copy of his book. The Empress of Russia sent students to him and had his Tours published in Russian. Young made three trips to France in 1787, 1788 and 1789–90 respectively, prior to and during the French Revolution, and his Travels in France (1792) is a remarkable account of that period, made all the more fascinating by his personal contact with people differing as widely as Mirabeau, the French revolutionary leader, and King Louis XVI.Unfortunately, in 1811 an unsuccessful cataract operation left him blind, and he moved from London to his native Bradford, where he remained until his death.[br]Principal Honours and DistinctionsChairman, Agricultural Committee of the Society of Arts 1773: awarded three Gold Medals during his career for his achievements in practical agriculture. FRS. Honorary Member of the Dublin, York and Manchester learned societies, as well as the Economic Society of Berne, the Palatine Academy of Agriculture at Mannheim, and the Physical Society of Zurich. Honourary member, French Royal Society of Agriculture. Secretary, Board of Agriculture 1793.BibliographyHis first novels were The Fair Americans, Sir Charles Beaufort, Lucy Watson and Julia Benson.His earliest writings on agriculture appeared as collected letters in a periodical with the title Museum Rusticum in 1767.In 1770 he published a two-volume work entitled A Course of Experimental Agriculture, and between 1766 and 1775 he published The Farmer's Letters, Political Arithmetic, Political Essays Concerning the Present State of the British Empire and Southern, Northern and Eastern Tours, and in 1779 he published The Tour of Ireland.In addition he was author of the Board of Agriculture reports on the counties of Suffolk, Lincoln, Norfolk, Hertford, Essex and Oxford.Further ReadingJ.Thirsk (ed.), 1989, The Agrarian History of England and Wales, Vol. VI (deals with the years 1750 to 1850, the period associated with Young).T.G.Gazeley, 1973, "The life of Arthur Young, 1741–1820", Memoirs, American Philosophical Society 97.AP -
45 רבי
רַבִּיm. (v. רַב II) (my teacher, my master, Rabbi, title of scholars, esp. of the Tannaim, and of the Palestinian Amoraim. B. Mets.85a חכים … ור׳ קרו לךוכ׳ I shall make thee a ḥackim, and a gold-embroidered cloak they shall spread over thee, and Rabbi they shall call thee Ib. 84a מאי …ר׳ קרו לי והכאר׳וכ׳ what good hast thou done me, there (among the Roman gladiators) they called me Rabbi (master), and here (as a scholar) they call me Rabbi. Ab. Zar.17b ומ״ט קרו לךר׳ רַבָּןוכ׳ and why do they call thee Rabbi? I am the chief master of weavers. Ib. ר׳ אלעזר; a. v. fr.Esp. Rabbi, surname of R. Judah han-Nasi. Gitt.59a מימות משה ועדר׳וכ׳ from the days of Moses to those of Rabbi we do not meet with learning and high office in one place (combined in one person). Ber.13a; Sot.32b. B. Mets.85a; a. v. fr. -
46 רַבִּי
רַבִּיm. (v. רַב II) (my teacher, my master, Rabbi, title of scholars, esp. of the Tannaim, and of the Palestinian Amoraim. B. Mets.85a חכים … ור׳ קרו לךוכ׳ I shall make thee a ḥackim, and a gold-embroidered cloak they shall spread over thee, and Rabbi they shall call thee Ib. 84a מאי …ר׳ קרו לי והכאר׳וכ׳ what good hast thou done me, there (among the Roman gladiators) they called me Rabbi (master), and here (as a scholar) they call me Rabbi. Ab. Zar.17b ומ״ט קרו לךר׳ רַבָּןוכ׳ and why do they call thee Rabbi? I am the chief master of weavers. Ib. ר׳ אלעזר; a. v. fr.Esp. Rabbi, surname of R. Judah han-Nasi. Gitt.59a מימות משה ועדר׳וכ׳ from the days of Moses to those of Rabbi we do not meet with learning and high office in one place (combined in one person). Ber.13a; Sot.32b. B. Mets.85a; a. v. fr.
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