GEOLOGY. 67 



The gold found in the bars and beds of the Klamath and 

 Salmon Rivers is in coarse particles, averaging 868 fine, and 

 mixed with iridium. 



The gold of Scott River is coarser and poorer. That of the 

 South Fork of Scott River is about 875 fine, and coarse. 



The gold on Trinity River, near Weaverville, is in small 

 particles, from 885 to 940 fine. 



Twenty miles below Weaverville, on the same river, the 

 gold is poorer — from 865 to 870. 



Still farther down, iridium becomes so abundant, that the 

 gold is worth a dollar or a dollar and a half per ounce less 

 than it would be if clear of that metal. 



In the gullies and hills near Weaverville there are rich dig- 

 gings of coarse gold, from 890 to 960 fine. 



At Gold Blufi"the gold is 950 fine. 



The gold found at Yuba is coarse, in rough, flat particles, from 

 ^20 to 830 fine. In some lumps from Yuba little pebbles have 

 been found hidden in their centre. 



The gold of most of the creeks near Yuba is from 845 to 

 850 fine. 



McAdam's Creek, near Shasta, yields gold from 875 to 885 

 fine. 



Cottonwood Creek, near the Oregon line, yields gold of the 

 same fineness. 



At Oro Fino, near Yuba, the gold is in wires, and, like all 

 wiry gold, is of poor quality, from 760 to 780 fine. 



The Shasta gold is generally coarse, ranging from 865 to 

 925 fine, except at French Gulch, where it is only 830 fine. 



The Pit River gold is coarse and poor, 830 fine. 



The Feather River gold is all good, from 890 to 920 fine. 



At Oroville it is from 920 to 940 fine. 



At La Porte, Gibsonville, and Pine Grove, in Sierra county, 

 the diggings are deep, and the gold coarse, and from 915 to 

 970 fine. At Poor Man's Creek, the gold is coated with some- 

 thing like an enamel, the color of iron-rust. When the gold 

 is pounded, this enamel breaks ofi*. 

 3* 



