Henry gellibrand (15 Ergebnisse)

Zustand: New. In English.

Zustand: New. In English.

Zustand: New. In English.

Zustand: New. In English.

Zustand: New.

Taschenbuch. Zustand: Neu. Neuware - This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.…

Zustand: New.

Taschenbuch. Zustand: Neu. Neuware.

Zustand: New.

Buch. Zustand: Neu. Neuware - Journey to the ends of the earth with Captaine Thomas James. This harrowing account details James' attempt to navigate the treacherous waters of the Northwest Passage, and the incredible hardships he and his crew endured along the way.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the 'public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.…

Buch. Zustand: Neu. Neuware.

Einband - fest (Hardcover). Zustand: New.

kl.4°. (8),96;(188);(92);(26),(1) S. errata, mit zahlr. Holzschnittillustr. im Text. Hld. d.Zt. auf 5 Bünden mit Rückentitel u. dekorativer Vergoldung, stark berieben, Überzugspapier tlw. abgeschabt, Besitzstempel a.d. Vorsatz, 1 Bl. mit kleinem Ausriß im weißen Rand, 1 Bl. mit Eckabriß (minimaler Textverlust), wenige Bl. mit geklebten Einrissen, durchgehend unterschiedlich (finger)fleckig, einige hs. Anmerkungen v. alter Hand, trotz dieser Mängel insges. aber noch durchaus gut erh. 1.Aufl. dieser Ausg. Die Chiliades centum logarithmorum u. Canones logarithmorum jeweils mit eigenen Titelbl.: Londini, Ex Officina Leybourniana 1658.…

Hardcover. Zustand: Very Good. 1st Edition. FIRST EDITION. pp. [ii], 78, [332]. AE8, AR8, S6, TX8. [without S7-8 blank]. Roman and Italic letter. Small typographical ornament on title, floriated woodcut initials, typographical headpieces, numerous woodcut diagrams in text, 332 pages of tables, book-label of Erwin Tomash on pastedown, "Lewis Dyve" on title in an slightly later hand with price 3/6. Light age yellowing. A very good copy, crisp and clean with many deckle edges, in contemporary calf, covers bordered with a a double blind rule, spine double blind ruled in compartments, later green paper label, brass catches, remains of clasps, stubbs from a printed bible leaf a.e.r. First edition of this important and influential work on trigonometry, with most interesting contemporary provenance. Gellibrand had been a student at Trinity College, Oxford, when he was introduced to mathematics and became acquainted with Henry Briggs. After graduation he was ordained and took a job as curate in a small town in Kent. When Edmund Gunter died in 1626, Gellibrand applied for his post as professor of astronomy at Gresham College and was elected in early 1627. One of his sponsors was Henry Briggs, and Gellibrand repaid the debt by completing the second volume of Briggs' Trigonometria Britannica and seeing it through the press after Briggs died in 1630. In 1632 Gellibrand completed Briggs's manuscript, and published it in 1633 as 'Trigonometria Britannica' According to Ward, an English translation of Gellibrand's book was published in 1658 by John Newton as the second part of a folio with the same title. During 1633 he also contributed 'An Appendix concerning Longitude' to 'The strange and dangerous Voyage of Captaine Thomas James,' 4to, 1633, which has been frequently reprinted. Gellibrand died of fever 16 Feb. 1636, and was buried in the church of St. Peter the Poor, Broad Street, London." DNB. Gellibrand is also known for his discovery of magnetic declination and for application of mathematics and astronomy to practical problems of navigation. This book contains two brief expositions on plane and spherical triangles followed by a major section consisting of trigonometric functions, logarithms and navigational and astronomical tables. Sir Lewis Dyve (15991669) was an English Member of Parliament and a Royalist during the English Civil War; he was knighted in 1620 and was one of the attendants of Prince Charles at Madrid. Dyve fought for the Royalist cause and was captured at the siege of Sherborne, later imprisoned in the Tower of London from 1645 to 1647. Being moved to the King's Bench, he escaped, but was recaptured at Preston. Imprisoned in Whitehall he escaped once more, according to his own account on the very day he was to have been executed; John Evelyn records in his Diary on 6 September 1651 that Dyve dined with him and related the story of his "leaping down out of a jakes two stories high into the Thames at high water, in the coldest of winter, and at night; so as by swimming he got to a boat that attended for him, though he was guarded by six musketeers. Dyve then made his way to Ireland where he once more served with the Royal forces; in 1650 he published an account of events in that country during the previous two years. A very good copy of this rare work. Two copies recorded in the US only; at the Folger and Huntington. ESTC S125464. STC 11712.5. Tomash G30. Henderson pp.62-63 no 33.0. …

First edition. DISCOVERY OF THE SECULAR CHANGE IN MAGNETIC VARIATION. First edition, extremely rare, of Gellibrand's most important discovery: the secular change in magnetic declination, or variation. According to William Gilbert in his De Magnete (1600), the existence of magnetic declination, the difference in direction between geographical and magnetic north, is a result of the magnetic effects of large land masses. This explained the observed dependence of variation on geographical location, but according to this theory the variation at a given location should not depend on historical time. Gellibrand's great discovery, that the variation in fact changes with time, not only disproved Gilbert's theory but was of great importance for navigation since a knowledge of the declination at various locations was used by sailors as an aid to determining their position at sea: "Thus hitherto (according to the Tenents of all our Magneticall Philosophers) we have supposed the variations of all particular places to continue one and the same. So that when a seaman shall happly returne to a place where formerly he found the same variation he may hence conclude he is in the same former longitude". "Gellibrand's most widely appreciated scientific discovery, which he should share with John Marr, was that of the secular change in the magnetic variation (declination). It was announced, without much comment, in A Discourse Mathematical) on the Variation of the Magneticall Needle, Together With Its Admirable Diminution Lately Discovered (1635). His predecessor, Gunter, had noticed that the variation at Limehouse in 1622 differed from the value found by William Borough in 1580, but he ascribed the difference to an error on Borough's part. In 1633 some rough observations of his own and John Marr's convinced Gellibrand that the value was now even less, but not until 1634 was he sufficiently confident to make a categorical assertion of its secular change. As his main evidence he referred to an appendix to Edward Wright's Certaine Errors in Navigation. (1599, 1610). This contains a compendium of recorded values of variation at various places made by a number of physicists and navigators the world over" (DSB). Less well known is that Gellibrand, in this book, gave the first clearly documented use of the arithmetic mean as a summary statistic (see below). We have been able to trace only three copies at auction in the last 50 years: the Kenney copy (sold Sotheby's 1968); the present copy (Sotheby's London, 11 November, 1974, The Library of Harrison D. Horblit, Part 2, Lot 450, £1200 to Traylen); and the Streeter copy, 'closely trimmed with loss of some headlines and shoulder notes' (sold at Sotheby's in 1968 and then at the Streeter sale at Christie's New York, 2007, $21,600). All three copies were either disbound or in modern bindings. Provenance: Eighteenth-century bookplate of Lord Dalrymple on verso of title page; Harrison D. Horblit (book label inside slip case); Henry Faul, University of Pennsylvania geophysicist, d. 1981 (book label inside slip case). Henry Gellibrand was the eldest son of a physician, also Henry, and was born on 17 November 1597 in the parish of St. Botolph, Aldersgate, London. In 1615 he became a commoner at Trinity College, Oxford, and obtained a BA in 1619 and an MA in 1621. After taking holy orders he became curate at Chiddingstone, Kent, but the lectures of Sir Henry Savile inspired him to become a full-time mathematician. He settled in Oxford, where he became friends with Henry Briggs, famed for introducing logarithms to base 10. It was on Briggs's recommendation that, on the death of Edmund Gunter, Gellibrand succeeded him as Gresham professor of Astronomy in 1627 - a post he held until his death from a fever on February 16, 1636. Gellibrand's principal publications were concerned with mathematics (notably the completion of Briggs' Trigonometria Britannica after Briggs died in 1630) and navigation. The road to Gellibrand's discovery starts with an observation of magnetic declination made by William Borough, a merchant seaman who rose to 'captain general' on the Russian trade route before becoming comptroller of the Queen's navy. The observation was made on 16 October 1580 at Limehouse, London, where he found the magnetic declination, D, to be 11.3°E. Borough had published his observations in his Variation of the Compas, which was included in Robert Norman's New Attractive, which first appeared in 1581. Some 40 years later, Edmund Gunter, distinguished mathematician, Gresham professor of astronomy, and inventor of the slide rule, found D to be only 6.3°E. The exact date (ca. 1622) and location (probably Deptford) of the observations are not stated but it alerted Gunter to the discrepancy with Borough's measurements. "indeed, he had been so intrigued by this discovery that he had inquired as to the exact place where, in Limehouse, William Borough had made his observations and then, with 'a Quadrant of three foot Semidiameter, and two Needles, the one above 6 inches, and the other 10 inches long,' had proceeded to the spot. Towards the night of 13 June 1622, he had made observations of the sun's azimuth from several parts of the ground . The mean of these observations, 5°55'E, is less by 20' than Gunter's previous observations and it is almost half of Borough's of 1580. Upon these differences, Gunter made no comment. He left it to others to draw their own conclusions" (Waters, p. 422). When Gunter dies in December 1626, he was succeeded as Gresham professor by Henry Gellibrand, who repeated Gunter's observations at Deptford, first in June 1633 and again on the same site on June 12, 1634, the published data giving D as 4°E. On the strength of these observations he announced his discovery of secular variation in the present work. The discovery was of great significance for navigation, because measuring the variation was used to determine longitude at sea. This method had been proposed by Simon Stevin is.…