|
See also:GUNTER, See also:EDMUND (1581-1626) , See also:English mathematician, of Welsh extraction, was See also:born in See also:Hertfordshire in 1581. He was educated at See also:Westminster school, and in 1599 was elected a student of See also:Christ See also:- CHURCH
- CHURCH (according to most authorities derived from the Gr. Kvpcaxov [&wµa], " the Lord's [house]," and common to many Teutonic, Slavonic and other languages under various forms—Scottish kirk, Ger. Kirche, Swed. kirka, Dan. kirke, Russ. tserkov, Buig. cerk
- CHURCH, FREDERICK EDWIN (1826-1900)
- CHURCH, GEORGE EARL (1835–1910)
- CHURCH, RICHARD WILLIAM (1815–189o)
- CHURCH, SIR RICHARD (1784–1873)
Church, See also:- OXFORD
- OXFORD, EARLS OF
- OXFORD, EDWARD DE VERE, 17TH EARL
- OXFORD, JOHN DE VERE, 13TH EARL OF (1443-1513)
- OXFORD, PROVISIONS OF
- OXFORD, ROBERT DE VERE, 9TH EARL OF (1362-1392)
- OXFORD, ROBERT HARLEY, 1ST
Oxford. He took orders, became a preacher in 1614, and in 1615 proceeded to the degree of See also:bachelor in divinity. See also:Mathematics, however, which had been his favourite study in youth, continued to engross his See also:attention, and on the 6th of See also:March 1619 he was appointed See also:professor of See also:astronomy in See also:Gresham See also:College, See also:London. This See also:post he held till his See also:death on the loth of See also:December 1626. With Gunter's name are associated several useful inventions, descriptions of which are given in his See also:treatises on the Sector, See also:Cross-See also:staff, See also:Bow, Quadrant and other See also:Instruments. He contrived his sector about the See also:year 16o6, and wrote a description of it in Latin, but it was more than sixteen years afterwards before he allowed the See also:book to appear in English. In 162o he published his See also:Canon triangulorum (see LOGARITHMS). There is See also:reason to believe that Gunter was the first to discover (in 1622 or 1625) that the magnetic See also:needle does not retain the same See also:declination in the same See also:place at all times. By See also:desire of
See also:- JAMES
- JAMES (Gr. 'IlrKw,l3or, the Heb. Ya`akob or Jacob)
- JAMES (JAMES FRANCIS EDWARD STUART) (1688-1766)
- JAMES, 2ND EARL OF DOUGLAS AND MAR(c. 1358–1388)
- JAMES, DAVID (1839-1893)
- JAMES, EPISTLE OF
- JAMES, GEORGE PAYNE RAINSFOP
- JAMES, HENRY (1843— )
- JAMES, JOHN ANGELL (1785-1859)
- JAMES, THOMAS (c. 1573–1629)
- JAMES, WILLIAM (1842–1910)
- JAMES, WILLIAM (d. 1827)
James I. he published in 1624 The Description and Use of His Majestie's Dials in See also:Whitehall See also:Garden, the only one of his See also:works which has not been reprinted. He introduced the words cosine and cotangent, and he suggested to See also:- HENRY
- HENRY (1129-1195)
- HENRY (c. 1108-1139)
- HENRY (c. 1174–1216)
- HENRY (Fr. Henri; Span. Enrique; Ger. Heinrich; Mid. H. Ger. Heinrich and Heimrich; O.H.G. Haimi- or Heimirih, i.e. " prince, or chief of the house," from O.H.G. heim, the Eng. home, and rih, Goth. reiks; compare Lat. rex " king "—" rich," therefore " mig
- HENRY, EDWARD LAMSON (1841– )
- HENRY, JAMES (1798-1876)
- HENRY, JOSEPH (1797-1878)
- HENRY, MATTHEW (1662-1714)
- HENRY, PATRICK (1736–1799)
- HENRY, PRINCE OF BATTENBERG (1858-1896)
- HENRY, ROBERT (1718-1790)
- HENRY, VICTOR (1850– )
- HENRY, WILLIAM (1795-1836)
Henry See also:Briggs, his friend and colleague, the use of the arithmetical See also:complement (see See also:Brigg's Arithmetica Logarithmica, cap. xv.). His See also:practical inventions are briefly noticed below:
Gunter's See also:Chain, the chain in See also:common use for See also:surveying, is 22 yds. See also:long and is divided into too links. Its usefulness arises from its decimal or centesimal See also:division, and the fact that 10 square chains make an See also:acre.
Gunter's See also:Line, a logarithmic line, usually laid down upon scales, sectors, &c. It is also called the line of lines and the line of See also:numbers, being only the logarithms graduated upon a ruler, which therefore serves to solve problems instrumentally in the same manner as logarithms do arithmetically.
Gunter's Quadrant, an See also:instrument made of See also:wood, See also:brass or other substance, containing a See also:kind of stereographic See also:projection of the See also:sphere on the See also:plane of the equinoctial, the See also:eye being supposed to be placed in one of the poles, so that the tropic, See also:ecliptic, and See also:horizon See also:form the arcs of circles, but the See also:hour circles are other curves, See also:drawn by means of several altitudes of the See also:sun for some particular See also:latitude every year. This instrument is used to find the hour of the See also:day, the sun's See also:azimuth, &c., and other common problems of the sphere or globe, and also to take the See also:altitude of an See also:object in degrees.
Gunter's See also:Scale (generally called by See also:seamen the Gunter) is a large plane scale, usually 2 ft. long by about 12 in. broad, and engraved with various lines of numbers. On one See also:side are placed the natural lines (as the line of chords, the line of sines, tangents, rhumbs, &c.), and on the other side the corresponding artificial or logarithmic ones. By means of this instrument questions in See also:navigation, See also:trigonometry, &c., are solved with the aid of a pair of compasses.
End of Article: GUNTER, EDMUND (1581-1626)
Additional information and Comments
There are no comments yet for this article.
Please link directly to this article:
Highlight the code below, right click, and select "copy." Then paste it into your website, email, or other HTML.
Site content, images, and layout Copyright © 2006 - Net Industries, worldwide.
Do not copy, download, transfer, or otherwise replicate the site content in whole or in part.
Links to articles and home page are always encouraged.
|
del.icio.us it!