GEOLOGY. 59 



of the town is from 920 to 930 fine. The Georgetown gold is 

 course, and from 890 to 920 fine. At Kelsey's Diggings the 

 fineness is 860. At Placerville the range is from 870 to 970. 

 Coon Hollow, near Placerville, produces gold 970 fine. At 

 Diamond Springs the fineness varies from 870 to 900. The 

 El Dorado or Mud Springs gold is 860 fine. The gold of the 

 Cosmnnes River varies from 865 to 875. 



The gold along the American River, in Sacramento county, 

 is from 915 to 920 fine. 



Most of the gold in Amador county is poor, from 865 to 

 920. The gold about Volcano averages 870 ; Jackson, 865 to 

 868 ; the Buttes, near Jackson, 920. 



The gold of the Mokelumne River, above Mokelumne Hill, 

 varies from 850 to 910. At the hill, some of the gold has been 

 980 fine. At Campo Seco the fineness is 900. Along the Mo- 

 kelumne River are many placers where the gold is in coarse, 

 wiry pieces, and poor in quaUty. At Vallecito, the fineness is 

 915 ; at San Andres, 920 ; at Murphy's, 885 ; at Douglas Flat, 

 890; at AngeFs, 890; at Jesus Maria, from 858 to 860; and 

 at Carson, from 890 to 920. 



The gold found along the Stanislaus River is from 875 to 

 880 fine. 



Columbia, in Tuolumne county, is the best place for good 

 gold in the state ; it ranges from 930 to 970. There are many 

 other places where gold equally fine is obtained, but none 

 which produces so much gold of a high fineness, with so small 

 a proportion of poor gold. The average of the Sonora gold is 

 900 ; Jamestown, 870 ; Montezuma Flat, 900 ; ravines at Chi- 

 nese Camp, 950 ; the river and creek claims at Chinese Camp, 

 860 ; Don Pedro's Bar, 880 ; Big-Oak Flat, 800 ; and Garote, 

 810. 



La Grange, in Stanislaus county, has gold 885 fine ; that of 

 the Merced River is from 845 to 860 fine. 



The gold of Mariposa county is poor, and much of it wiry, 

 ranging from- 700 to 820 fine, averaging about 760. Some of 

 the gold of Mariposa county is coarse, and resembles that of 



