MiscellaneoiLs Publications. 161 



MOFRAS, DUFLOT De. 



According to De Mofras, silver ores occur about two leagues 

 northwest of Cahuenga Rancho, and were not worked for want of 

 mercury. He further observes that the Indians often bring in 

 from the mountains, grains of copper, fragments of opal, and pieces 

 of galena. Mines of gold and silver are also said to have been 

 found about fourteen leagues from San Diego. They were once 

 worked by a man from Guanajuata. 



There is a notice of the bitumen near Los Angeles on p. 337, 

 vol. 2. The author states : "Two leagues to the southeast of Los 

 Angeles there are four great sources of asphaltum, situated on a 

 level with the earth in a vast prairie. These springs open in the 

 middle of little pools of cold water, while the bitumen possesses a 

 higher temperature. This water has a mineral taste, which, how- 

 ever, does not prevent animalfe from drinking it. At sunrise the 

 orifices of these springs are covered by enormous bubbles of asphal- 

 tum, often being more than a yard high, and looking like soap 

 bubbles." 



MoLiTOR, A. P. Essay on California gold. San Francisco, 

 1860. 



This work is said to be a very valuable essay on this subject. 



MowRY, Sylvester. The mines of the West. New York, 

 1864. 



MuiR, J. Living glaciers of California. In Harper's Mag., 

 vol. 51, 1875, pp. 769-777. 



MuRCHisoN, Sir R. Siluria : A history of the oldest rocks in 

 the British Isles and other countries ; with sketches of the 

 origin and distribution of native gold, the general suc- 

 cession of geological formations, and changes of the 

 earth's surface. 1st edition, London, 1854; geological 



map and 37 plates of fossils. 2d edition, London, . 



3d edition, London, 1859 ; geological map and 41 plates of 

 fossils. 4th edition, London, 1867; geological map and 

 42 plates. 5th edition, London, 1872; with geological 

 map and atlas of 42 plates. 



ORDHOFP, Charles. California for health, pleasure, and res- 

 idence: a book for travelers and settlers. New York, 

 1873. 255 pp. 



Contains notice of gold mining, with a few geological notes. 



