28 A Bibliography of the Geology, etc., of California. 



Tour of the gold regions ; by Bvt. Brig.-Gen. Bennett Riley. 

 (31st. Cong., 1st sess., Ho. of Rep. Doc. 17, 1850, pp. 



785-792.) 



United States and Mexican Boundary Survey, under the orders 

 of Lieut.-Col. W. H. Emory. Geology and Palaeontology 

 of the Boundary, by -James Hall ; pp. 103-140, Part 2. 

 Description of Cretaceous and Tertiary Fossils, by T. A. 

 Conrad; pp. 141-165. (34th Cong., 1st sess.. Senate Ex. 

 Doc. 108. Washington, 1857.) 



Chapter V contains description of the geology of Southern Cali- 

 fornia, with a section of lignite bluff near San Diego. 



Notes on route from near the Tejon Pass, through western New 

 Mexico and the Colorado to Santa Fe in the fall of 1853; 

 by Capt. F. C. Aubrey. 12 pp. [Published by Congress 

 in 1854 and in the California journals.] 



This was the route through the gold country on the head (southern) 

 waters of the San Juan and the upper branches of the Rio Salodo, or 

 Salinas, of the Gila River. 



Report upon Pacific wagon roads. Washington, 1858. (35th 

 Cong., 2d sess., Ho. of Rep. Ex. Doc. 108, Senate Doc. 36.) 



Report of Survey on the Union and Central Pacific Railways; 

 by W. T. Twining. Washington, 1875. (44th Cong., 2d 

 sess., Ho. of Rep. Doc. 38.) 



Mining debris in California. Preliminary report; by Col. (jeo. 

 H. Mendell. Submitted January 31, 1881. 



Mining debris in California rivers. Letter of the Secretary of 

 War. A final report upon the system to prevent further 

 injury to the navigable waters of California from mining 

 debris. 1882. 110 pp. 2 maps. (47th Cong., 1st sess., 

 Ho. of Rep. Ex. Doc. 98.) 



Mining debris in California. Letter of the Secretary of War. 

 Report of Board of Government Engineers respecting 

 the adjustment of the conflict between the mining and 

 farming sections, and the rehabilitation of the mining 

 industry in California. 1891. 124 pp. 2 maps. (Ex. 

 Doc. 267, H. R., 51st Cong., 2d sess.) 



