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Publications of the United States Government. 49 



REPORTS OF THE SECRETARY OF WAR. 



Information in relation to the geology of California: 



Report of P. T. Tyson upon the geology of California. 31st 

 Cong., 1st sess., Senate Ex. Doc. 47. Washington, 1850. 

 74 pp. 9 sections and 1 map. 



This report contains articles on the geology of part of the Sierra 

 Nevada ; geology of the Coast Range ; geological structure of Sac- 

 ramento Valley ; review of the geological changes in California ; 

 gold regions of the Sierra Nevada ; the quicksilver mines ; other 

 mineral resources, and their industrial applications. 



Report by General Smith, dated October 7, 1849. pp. 

 75-108. 



Report of Lieutenant Talbot to General Smith of his ex- 

 plorations in Oregon, dated October 5, 1849. pp. 108-116. 



Report of Professor Frazer on minerals forwarded by Gen- 

 eral Smith, dated March 21, 1850. pp. 116-117. 



Report of General Riley, dated January 1, 1850. pp. 118- 

 119. 



Report of Lieutenant Ord to General Riley of investigations 

 in the southern part of Alta California, dated October 31, 

 1849. pp. 119-127. 



Part 11. Report of the Secretary of War in further compli- 

 ance with the resolution of the Senate, calling for copies 

 of Report on the Geology and Topography of California. 

 Washington, 1850. 37 pp., and 3 maps. (31st Cong., 1st 

 sess., Senate Ex. Doc. 47.) 



This report contains : A topographical memoir accompanying 

 maps of the Sacramento Valley, etc. (scale, 10 miles to 1 inch) ; 

 by Lieut. G. H. Derby, pp. 2-16. 



Reconnoissance made by Capt. W. H. Warner of a route through 

 the Sierra Nevada by the upper Sacramento, pp. 16-34, with maps. 



Exploration of Monte Diablo, and the valley lying between this 

 mountain and the southern shore of Suisun Bay ; by Lieut. R. S. 

 \Villiamson. pp. 34-37. 



