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HALLER, BERTHOLD (1492–1536)

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Originally appearing in Volume V12, Page 857 of the 1911 Encyclopedia Britannica.
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HALLER, BERTHOLD (1492–1536) , Swiss reformer, was See also:born at Aldingen in See also:Wurttemberg, and after studying at See also:Pforzheim, where he met See also:Melanchthon, and at See also:Cologne, taught in the gymnasium at See also:Bern. He was appointed assistant preacher at the See also:church of St See also:Vincent in 1515 and See also:people's See also:priest in 1520. Even before his acquaintance with See also:Zwingli in 1521 he had begun to preach the See also:Reformation, his sympathetic See also:character and his In 1696 he was, although a zealous Tory, appointed See also:deputy See also:comptroller of the See also:mint at See also:Chester, and (See also:August 19, 1698) he received a See also:commission as See also:captain of the " Paramour See also:Pink " for the purpose of making extensive observations on the conditions of terrestrial See also:magnetism. This task he accomplished in a voyage which lasted two years, and extended to the 52nd degree of S. See also:latitude. The results were published in a See also:General See also:Chart of the Variation of the See also:Compass in 1701; and immediately afterwards he executed by royal command a careful survey of the tides and coasts of the See also:British Channel, an elaborate See also:map of which he produced in 1702. On his return from a See also:journey to See also:Dalmatia, for the purpose of selecting and fortifying the See also:port of See also:Trieste, he was nominated, See also:November 1703, Savilian See also:professor of See also:geometry at See also:Oxford, and received an honorary degree of See also:doctor of See also:laws in 1710. Between 1713 and 1721 he acted as secretary to the Royal Society, and See also:early in 1720 he succeeded See also:Flamsteed as astronomer-royal. Although in his sixty-See also:fourth See also:year, he undertook to observe the See also:moon through an entire revolution of her nodes (eighteen years), and actually carried out his purpose. He died on the 14th of See also:January 1742. His See also:tomb is in the old graveyard of St See also:Margaret'schurch,See also:Lee, See also:Kent. See also:Halley's most notable scientific achievements were—his detection of the " See also:long inequality " of See also:Jupiter and See also:Saturn, and of the See also:acceleration of the moon's mean See also:motion (1693), his See also:discovery of the proper motions of the fixed stars (1718), his theory of variation (1683), including the See also:hypothesis of four magnetic poles, revived by C. See also:Hansteen in 1819, and his See also:suggestion of the magnetic origin of the See also:aurora borealis; his calculation of the See also:orbit of the 168e See also:comet (the first ever attempted), coupled with a prediction of its return, strikingly verified in 1759; and his indication (first in 1679, and again in 1716, Phil.

Trans., No. 348) of a method extensively used in the 18th and 19th centuries for determining the See also:

solar See also:parallax by means of the transits of See also:Venus. His See also:principal See also:works are Catalogus stellarum australium (See also:London, 1670), the substance of which was embodied in vol. iii. of Flamsteed's Ilistoria coelestis (1725); Synopsis astronomiae cometicae (Oxford, 17o5); Astronomical Tables (London, 1752) ; also eighty-one See also:miscellaneous papers of considerable See also:interest, scattered through the Philosophical Transactions. To these should be added his version from the Arabic (which See also:language he acquired for the purpose) of the See also:treatise of See also:Apollonius De sectione rationis, with a restoration of his two lost books De sectione spatii, both published at Oxford in 1706; also his See also:fine edition of the Conics of Apollonius, with the treatise by See also:Serenus De sectione cylindri et See also:anti (Oxford, 1710, See also:folio). His edition of the Spherics of See also:Menelaus was published by his friend Dr Costard in 1758. See also Biographia Britannica, vol. iv. (1757) Gent. Mag. xvii. 455, 503; A. See also:Wood, Athenae Oxon. (See also:Bliss), iv. 536; J.

See also:

Aubrey, Lives, it. 365; F. See also:Baily, See also:Account of Flamsteed; See also:Sir D. See also:Brewster, See also:Life of See also:Newton; R. See also:Grant, See also:History of See also:Astronomy, p. 477 and passim; A. J. See also:Rudolph, Bulletin of Bibliography, No.14 (See also:Boston, 1904) ; E. F. McPike, ' Bibliography of Halley's Comet," Smithsonian Misc. Collections, vol. xlviii. pt. i. (1905); Notes and Queries, 9th See also:series, vols. x. xi. sit., Loth series, vol. ii.

(E. F. NlcPike). A collection of See also:

manuscripts regarding Halley is preserved among the See also:Rigaud papers in the Bodleian library, Oxford; and many of his unpublished letters exist at the See also:Record See also:Office and in the library of the Royal Society. (A. M.

End of Article: HALLER, BERTHOLD (1492–1536)

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