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7. Reports on the Geology and Topography of California; commu- 
nicated to the Senate by the Secretary of War. Ex. Doc., No. 47, 
Blst Congress, 1st Session.—This volume includes a Report on Cali- 
fornia by Mr. P. T. Tyson; a Report of General Smith; of Lieut. 
Talbot to General Smith; of Prof. J. F. Frazer on minerals forwarded 
by Gen. Smith; of Gen. Riley; of Lieut. Ord to Gen. Riley; of Lieut. 
Derby of his survey of a portion of the valley of the Sacramento; of 
Lieut. R. S. Williamson of the reconnaissance made by Capt. W. H. 
tp F 
litz, Oregon; sp. gr. 1-314 
Loss of weight at 212° (water &c.), 4:9 
z3 * at red heat (bitumen), 495 
* “by combustion (from carbon), 42:9 
Ash residuum, 2-7 
100-0 
A drab colored compact limestone, (sp. gr. 2°63,) from Monte Diavolo 
near San Francisco afforded Mr. A. Muckle his assistant, 
Carbonate of lime, : . 8 
Carbonate of magnesia, . . : <icet e 
Oxyd of iron and alumina, . , : ; 1-4 
Silica, . : : ; : : ‘ “ee 
Water, Sn hn A a ee 
mainly of the coal-bearing rocks of the district of Sabero, Spain, which, 
although like the true carboniferous formation, de Verneuil is inclined 
e b 
Colle and Las Bodas where they pass beneath Cretaceous roc 
t 
_ hes, the harbor of Brest, and of Nehou (Manche) and of Ferques in 
‘ France, and belong, as the fossils indicate, to the devonian formation. 
_ This important memoir is accompanied by figures and descriptions of 
the fossils by Verneuil. 
_ * For a sketch of the Bute, see this Journal, 2nd Ser., vol. vii, p. 259. 
