Agricultural Chemistry. 135 
in Nevada and California for the extraction of gold and eh and is 
intended especially for the mining public of California and Neva he 
first part contains a chapter on the blow ipe, a description of gold and 
silver ores and the methods of assaying them, besides the extrac tion pro- 
cesses above alluded to. Part second, is a treatise on the general metal- 
lurgy of silver ores and is translated from Kerl’s “Hiittenkunde.” It 
contains further, a valuable series of tables showing the amount of fine 
silver per ton of ore and the values of silver and gold per ounce in the 
bar. The book seems to have been written and eh with considera- 
ble care by one who evidently understands his subject, and from our 
examination of it we should think it to be well adapted "for the purpose 
for which it was prepared. 
IV. AGRICULTURAL CHEMISTRY. 
. Die Chemie in ihrer Anwendung auf Agricultur und Physiologie, 
von y ustus von Lizsic. In zwei Theilen. Siebente Auflage. Erster Theil: 
—Der Chemische Process der Ernihrung der Vegetabilien. Zweiter Theil: 
—Die Naturgesetze des Feldbaues, Braunschweig, 1862. Also The Natu- 
ral Laws of guarene ry, by Justus von We cel c. Edited by Jony Bryrn, 
M. _ New ork : D. Appleton & Co., '3.—The seventh edition of 
The se 
faithful Aig satin translation n, is a new book w scope may be im 
perfectly gathered from the following titles of its chapte ers: 
Chap. I. Th Chap. II. The Soil; Chap. III. Action of Soil 
on Food of Plants in Manure; Chap. IV. Farm ee Manure; Chap. V. 
The System of Farm-yard Manuring; Chap. VI. Guano; Chap. VII. 
peal Excrements; Chap. VIII. Earthy Phosphates ; Chap. 
und Rape-Cake; Chap. X. Wood-Ash; Chap. XI. Ammonia 
and Nit Ni Sk ee XIL Common Salt, Nitrate of Soda, Salts of 
mo , Li 
This wo otk is ities n in ike earnest captivating athe pid characterizes 
the pienso of Liebig; it displ 2h vast knowledge and will be of 
Sea service to the science of agriculture by exciting Mitaiton and 
reb. 
“The work is largely devoted to the adv: of certain doctrines which 
different soils and felts 2, That the pill thagtl active process 0 
gaseous and liquid diffusion eka does not apply in full force to- the 
