See also:JOHN See also:MICHELL (1724-1793)
, See also:English natural philosopher and geologist, was See also:born in 1724, and educated at Queens' See also:College, See also:Cambridge
.
His name appears See also:fourth in the Tripos See also:list for 1748-1749; and in 1755 he was See also:moderator in that examination
.
He became M.A. in 1752, and B.D. in 1761
.
He was a See also:fellow of his college, and was appointed Woodwardian See also:professor of See also:geology in 1762, and in 1767 See also:rector of See also:Thornhill in See also:Yorkshire, where he died on the 29th of See also:April 1793
.
He was
elected a fellow of the Royal Society in the same See also:year as 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:Cavendish (176o)
.
In 1750 he published at Cambridge a See also:work of some eighty pages entitled A See also:Treatise of Artificial Magnets, in which is shown an easy and expeditious method of making them See also:superior to the best natural ones
.
Besides the description of the method of magnetization which still bears his name, this work contains a variety of accurate magnetic observations, and is distinguished by a lucid exposition of the nature of magnetic See also:induction
.
He was the See also:original inventor of the torsion See also:balance, which afterwards became so famous in the hands of its second inventor See also:Coulomb
.
See also:Michell described it in his proposal of a method for obtaining the mean See also:density of the See also:earth
.
He did not live to put his method into practice; but this was done by Henry Cavendish, who made, by means of Michell's apparatus, the celebrated determination that now goes by the name of Cavendish's experiment (Phil
.
Trans., 1708)
.
His most important See also:geological See also:essay was that entitled Conjectures concerning the Cause and Observations upon the Phaenomena of Earthquakes (Phil
.
Trans., li
.
176o), which showed a remarkable knowledge of the strata in various parts of See also:England and abroad
.
Michell's other contributions to See also:science are: " Observations on the See also:Comet of See also:January 176o at Cambridge, Phil
.
Trans
.
(176o) ; " A Recommendation of See also:Hadley's Quadrant for See also:Surveying," ibid
.
(1765) ; " Proposal of a Method for measuring Degrees of See also:Longitude upon See also:Parallels of the See also:Equator," ibid
.
(1766) ; " An Inquiry into the Probable See also:Parallax and Magnitude of the Fixed Stars," ibid
.
(1767); " On the Twinkling of the Fixed Stars," ibid
.
(1767), " On the Means of Discovering the Distance, Magnitude, &c., of the Fixed Stars," ibid
.
(1784)
.
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