Works of Lavoisier. 105 
audacity, tact, and some patronage are also required. Poor Silbermann 
had nothing of all this; he did not express himself easily either in words 
or in writing, 
He died July 4th, 1865, well satisfied that, as some return for his ser- 
vices, he should be remembere y those whis survive him. Will he be 
mistaken j in this hope? In the eddy spp -chase pews occupies the 
scientific world of Paris, there is no st for those who fall; the 
prize is for those who sonal the goal; it seuahert little by what means. 
List of the Scientific labors of J. Th. Taek taken from Poggendorff’s Hand- 
nstrument for ep seein, the focal Ian of lenses and mirrors, (28 Feb., 1842). 
Foco 
This instrument is known as the 
eliostat, to direct the beams of resp sun ie the interior of the camera, as well 
as into the lecture room, (Feb. 7th, 1842). This instrument is known in science un- 
ler the f rm Sire Heli 
Sym Aastra _peepsitat (18 
Sonam ter easuring Page heights, dic, (July 7th, 1845). 
ments on i the rapidity of motion of Electricity, (March 27th, 1847). 
Gintectinal alcoho — meter. 
Apparatus for the mpa rison of measures. 
Apparatus for sae —— 
“Comparateur a aren : io 
Metrical_ measurements of the human bay. Mean of hum Law of 
length and oe si og of measures of tng ae their yolation € to the mean 
ages se beautiful researches now classic, upon the heat of combination, 
cartied on wit Prof. Favre, researches which occupied him more than three years 
and find their place in all treatises. They are published entire in the “ Annales de 
Chimie et de Physique” for 1853. They are illustrated by some hundreds of ex- 
periments, 
although, in 1843, Dumas, then President of the Academy of Sci nee, 
ed from the Minister of Public Instruction ph oie that the pub- 
lication should be made at the expense of the department. It w pct not till 
nomy, &e. 
oisier was a complete man. He was not only remarkable as a chem- 
Ist and physicist; he was an adintnietrater of no ordinary merit. is is 
evident in the oP ab which he has left, and which will Me with the 
Series of unpublished documents that Dumas has collected in part from 
Aw. Jour. Ser.—Szcoxp Szntms, Vou. XLI, No. phere 
4 
