420 Scientific Intelligence. 
student will derive from studying this subject, when so systemati- 
cally presented. We are indebted to the translator for the intro- 
duction of the shonidoal nomenclature and notation of modern 
chemistry, for some advantageous condensation, and for the addi- 
tion of more or less new matter 
II. GroLtoGy AND MINERALOGY. 
1. Geological and Geographical coding of the Territories ; by 
. Haypen, U. 8. Geologist in charge. Conducted under the 
authority of the Secretary of the Nav vy. Washington.—The fol- 
lowing are notices of the recent publications of Dr. Hayden’s 
pet EE which has been so rich in results to science and the 
“(. )  Winth Annual Report, being a Report of Progress for the 
year 1875. 810 pp. 8vo, ser numerous plates.—This volume 
ports by A. D. Wirson and F. B. Raopa, H. Gannett. we 
CumirTENDEN and G. R, Brecu LER; and Zoclogical Reports on the 
History of the American Bison, . A, ALLEN; and on the 
ocky Mountain Locust and other i injurious insects of th e West, 
$i: A, > Packarp, Jr. We cite a few facts from some of these 
River pe formed a shore-line in Cretaceous’ times.” ‘The 
area of the Archean Continent was probably of some consider- 
sion of that farther east, where the main chain of the Rocky 
Mountains is now.” No Silurian or Devonian beds were ob- 
served; and over a great part of the district the red beds (Trias- 
sic) re rest immediately on the Archwan. The thickness of the 
Carboniferous in Colorado is stated to be 4,000 to 5,000 feet ; and 
of this only 500 to 1,000 feet consist of fra mental rocks. The 
accounts of the other formation contain interesting sections and 
many important details. 
