See also:PIERRE See also:BOUGUER (1698-1758)
, See also:French mathematician, was See also:born on the 16th of See also:February 1698
.
His See also:father, See also:John See also:Bouguer, one of the best hydrographers of his 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, was regius See also:professor of See also:hydrography at Croisic in See also:lower See also:Brittany, and author of a See also:treatise on See also:navigation
.
In 1713 he was appointed to succeed his father as professor of hydrography
.
In 1727 he gained the See also:prize given by the Academie See also:des Sciences for his See also:paper " On the best manner of forming and distributing the masts of See also:ships "; and two other prizes, one for his dissertation " On the best method of observing the See also:altitude of stars at See also:sea," the other for his paper " On the best method of observing the variation of the See also:compass at sea." These were published in the Prix de l' See also:Academic des Sciences
.
In 1729 he published Essai d' optique sur la gradation de la lumiere, the See also:object of which is to define the quantity of See also:light lost by passing through a given extent of the See also:atmosphere
.
He found the light of the See also:sun to be 300 times more intense than that of the See also:- MOON (a common Teutonic word, cf. Ger. Mond, Du. maan, Dan. maane, &c., and cognate with such Indo-Germanic forms as Gr. µlip, Sans. ma's, Irish mi, &c.; Lat. uses luna, i.e. lucna, the shining one, lucere, to shine, for the moon, but preserves the word i
- MOON, SIR RICHARD, 1ST BARONET (1814-1899)
moon, and thus made some of the earliest measurements in See also:photometry
.
In 1730 he was made professor of hydrography at See also:Havre, and succeeded P
.
L
.
M. de See also:Maupertuis as See also:associate geometer of the Academic des Sciences
.
He also invented a See also:heliometer, afterwards perfected by See also:Fraunhofer
.
He was afterwards promoted in the See also:Academy to the See also:place of Maupertuis, and went to reside in See also:Paris
.
In 1735 Bouguer sailed with C
.
M. de la Condamine for See also:Peru, in See also:- ORDER
- ORDER (through Fr. ordre, for earlier ordene, from Lat. ordo, ordinis, rank, service, arrangement; the ultimate source is generally taken to be the root seen in Lat. oriri, rise, arise, begin; cf. " origin ")
- ORDER, HOLY
order to measure a degree of the See also:meridian near the See also:equator
.
Ten years were spent in this operation, a full See also:account of which was published by Bouguer in 1749, Figure de la terre determinee
.
His later writings were nearly all upon the theory of navigation
.
He died on the 15th of See also:August 1758
.
The following is a See also:list of his See also:principal See also:works:—Traite d'optique sur la gradation de la lumiere (1729 and 176o) Entretiens sur la cause d'inclinaison des orbites des planetes (1734) ; Traite de navire, &c
.
(1746, 4to); La Figure de la terre determinee, &'c
.
(1749), 4to; Nouveau traite de navigation, contenant la theorie et la pratique du pilotage (1753); See also:Solution des principaux problemes sur la manoeuvre des vaisseaux (1757); Operations faites pour la verification du degre du meridien entre Paris et See also:Amiens, See also:par See also:Mess
.
Bouguer, See also:Camus, See also:Cassini et Pingre (1757)
.
See J
.
E
.
See also:Montucla, Histoire des mathematiques (1802)
.
End of Article: