 l vol. in 8vo, 2de edition. Paris: chez Hachetie & Co.—T 
124 Correspondence of J. Nickles. 
d these proportions should be preserved for the subsequent opera: — 
tions, as long as the rotation of the same oxyd and same sulphuret of 
iron continues. Pe 
e same process may be used with the oxyds of manganese and 
zinc, but with greater difficulties, as the ‘ délitation” and ‘ carbona- 
tion” in these cases are more complicated. 
sonst ree SE a AC cueil des Travaux Scientifiques de M. EBEL xia, 
a 
seur de 
ela iene os de Sévres, etc., publié par M. Salvetat. 2 vols. in 
on Paris: chez Mallet- an elie ni arene died on the 2nd of - 
April, 1852, at the age of 38 years, having been born in 1814. He 
passed through the Gastceban: patios and the School of Minesgaed 
nall 
covery in his researches on compounds crystallized b 
he made artificially several minerals such as spinel, chryso 
solite, corundum, Brookite, Perofskite, and also gluc ina. 
e process which he employed in his investigations arg ‘domed 
in the work just published. His labors are presented under the heads 
of Ceramic Chemistry, Reports on Ceramic Industry, Geological re- 
pa Metallurgical researches, Metallurgy of iron, and Heating 
of Locomotives. Some of his labors rank among the highest in the 
acta world, especially his synthesis of minerals, in which he 
vised methods of making even some of the gems. His publications 
welcomed both by men of science and those int terested in the 
indubtvial arts. 
Lecons de C osmographie; par M. Faye, Membre de Ls 
LET, one de Nstitut. 2 vols. in 8vo, with an Atlas. Paris: ¢ 
—— & Co.—M. ‘Ponill et was one of the most eloquent profess 
had the happy talent of making the most abstruse’ 
jocteens to his audience. His work exhibits the same character 
tics. The sixth edition is just issued, and the sale of it is far from 
coming to and end. 
