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See also:DOLLOND, See also:JOHN (1706—1761) , See also:English optician, was the son of a Huguenot refugee, a See also:silk-See also:weaver at See also:Spitalfields; See also:London, where he was See also:born on the loth of See also:June 1706. He followed his See also:father's See also:trade, but found See also:- TIME (0. Eng. Lima, cf. Icel. timi, Swed. timme, hour, Dan. time; from the root also seen in " tide," properly the time of between the flow and ebb of the sea, cf. O. Eng. getidan, to happen, " even-tide," &c.; it is not directly related to Lat. tempus)
- TIME, MEASUREMENT OF
- TIME, STANDARD
time to acquire a knowledge of Latin, See also:Greek, See also:mathematics, physics, See also:anatomy and other subjects. In 1752 he abandoned silk-See also:weaving and joined his eldest son, See also:- PETER
- PETER (Lat. Petrus from Gr. irfpos, a rock, Ital. Pietro, Piero, Pier, Fr. Pierre, Span. Pedro, Ger. Peter, Russ. Petr)
- PETER (PEDRO)
- PETER, EPISTLES OF
- PETER, ST
Peter Dollond (1730-1820), who in 1750 had started in business as a maker of See also:optical See also:instruments. His reputation See also:grew rapidly, and in 1761 he was appointed optician to the See also:- KING
- KING (O. Eng. cyning, abbreviated into cyng, cing; cf. O. H. G. chun- kuning, chun- kunig, M.H.G. kiinic, kiinec, kiinc, Mod. Ger. Konig, O. Norse konungr, kongr, Swed. konung, kung)
- KING [OF OCKHAM], PETER KING, 1ST BARON (1669-1734)
- KING, CHARLES WILLIAM (1818-1888)
- KING, CLARENCE (1842–1901)
- KING, EDWARD (1612–1637)
- KING, EDWARD (1829–1910)
- KING, HENRY (1591-1669)
- KING, RUFUS (1755–1827)
- KING, THOMAS (1730–1805)
- KING, WILLIAM (1650-1729)
- KING, WILLIAM (1663–1712)
king. In 1758 he published an " See also:Account of some experiments concerning the different refrangibility of See also:light " (Phil. Trans., 1758), describing the experiments that led him to the achievement with which his name is specially associated, the See also:discovery of a means of constructing achromatic lenses by the See also:combination of See also:crown and See also:flint glasses. Leonhard See also:Euler in 1747 had suggested that See also:achromatism might be obtained by the combination of See also:glass and See also:water lenses. Relying on statements made by See also:Sir See also:Isaac See also:Newton, Dollond disputed this possibility (Phil. Trans., 1753), but subsequently, after the See also:Swedish physicist, See also:Samuel Klingenstjerna (1698—1765), had pointed out that Newton's See also:law of See also:dispersion did not harmonize with certain observed facts, he began experiments to See also:settle the question. See also:Early in 1757 he succeeded in producing See also:refraction without See also:colour by the aid of glass and water lenses, and a few months later he made a successful See also:attempt to get the same result by a combination of glasses of different qualities (see See also:TELESCOPE). For this achievement the Royal Society awarded him the See also:Copley See also:medal in 1758, and three years later elected him one of its See also:fellows. Dollond also published two papers on apparatus for measuring small angles (Phil. Trans., 1753, 1754). He died in London, of
See also:apoplexy, on the 3oth of See also:November 1761.
An account of his See also:life, privately printed, was written by the Rev. John See also:Kelly (1750-1809), the See also:Manx See also:scholar, who married one of his granddaughters.
End of Article: DOLLOND, JOHN (1706—1761)
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