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BIBLIOGRAPHICAL NOTICE. 
1. Preliminary Field- Heport of the United-States Geological Survey of 
Co lorado and New Mexico, conducted, under the authority of the 
lo eit With a Report on the Mines and Minerals of Colorado, 
by Pxrstror Frazer, junior; and a Report on the Agriculture 
a "eh ado, by Cyrus Tuomas, Svo, pp. 155. Washington, 
ho 
. DM gical Report of the Exploration of the Yellowstone and Mis- 
souri Boe y Dr. F. V. Haxpzs, under the direction of Captain 
xNorps, Eng. 1859-60. "With Report on the Cretaceous 
and Tertiary Plants, by J. S. N dde quA M.D. 8vo, pp. 174. 
Washington, 1869. With a Geological 
The Lifted and Subsided Rocks of ee with their Infivenoet 
on the Oceanic, Atmospheric, and Land Currents, and the Distri 
et of Races. By Grorer Carrin. 8vo, pp. 228. fondos. 
e 
Lum ia States Secretary of the Interior reported last year that 
Congress had appropriated $10,000 for the continuance of the Geo- 
logieal Survey of the Territories of the United States by Professor 
Hayden, and that he was instructed by the Department of the 
Interior to direct his attention especially to the geological, minera- 
logical, and agricultural resources of the Territories of Colorado and 
N : 
other deposits of ores, coals, clays, marls, peat, and other mineral 
substances, as well as the fossil remains of the different formations 
He entered on his labours in the field the last day of June 1869, at 
Cheyenne, Wyoming Territory. His route was through Denver, the 
silver- and gold-mining region of Georgetown and Central City, the 
Middle Park, Daten City, and Fort Union to Santa Fé, returning 
through the San-Luis valley and South Park to Denver. The ex- 
the collections in geology, mineralogy, botany, and zoology were 
extensive. His preliminary report bears date October ~ It is 
eiie sepas by two other reports made to him by his assistants— 
e on mines and mining, the other on agriculture ese papers, 
the Secretary of the Interior remarks, are valuable contributions 
to our knowledge of the subjects they embrace, and merit careful 
perusal; and certainly we fully agree with him, even if we take this 
Field-report of Colorado and New Mexico by itself ; and their value 
is more fully seen when studied together with Dr. Hayden’ s Report 
on the Exploration of the Yellowstone and Missouri Rivers, and 
other reports on sas, Nebraska, &e., by United States geologists. 
The Colorado Territory, b between 37° and 41? N, lat. and 102? and 
109° W. long., almost equally divided into highlands, on both slopes 
of the Rocky "Mountains (reaching 13,000 feet above the sea), and 
