STATE AGRICULTURAL SOCIETY. 341 



copper pyrites. It is associated with yellow copper in the Napoleon 

 Mine and the Llancha Plana; in Scrrameuto Cy«/i^^, at Michigan Bar, 

 associated with galena, oxide of iron, and copper ore. (Cabinet of Dr. 

 .Frey.) Placer Counf//, fifteen miles from Lincoln, towards Nevada, with 

 galena and gold; at the Bloom claim, near Angels' Camp, Calaveras 

 County; also in a quartz vein in Coulterville. 



BOEAX. 



Lake County^ in large crystals in the clay of the Borax Lake. 



BOKACIC ACID. 

 Clear Lake, Lake County. 



CARBONATE OF MAGNESIA. 

 (See Magnesite.) 



CAEBONATE OF SODA. 



Snn Bernardino Conn ft/, at Soda Lake, sink of the Mohave Eiver; in 

 Tulare County, along the borders of the smaller lakes, when drying up; 

 at the borders of the Santa Anna Eiver, near San Bernardino. 



CASSITEEITB. 



San Bernardino County, at the " Temescal tin region," about sixty miles 

 fi'om Los Angeles. Occurs in many veins associated with schorl (?) tra- 

 versing granite. In most of the ores the tin oxyd is found only by 

 crushing and washing. At the "Gun lode" a peculiar drab colored oxyd 

 is foiuui in considerable quantities. It appears to be liberated by the 

 decomposition of an arsenical ore, arsenic being abundant in the sam- 

 ples. The oxyd, as collected in that region for examination, is in various 

 degrees of puritj', and exhibits different colors. Some of the samples 

 obtained by washing are black, others brown, and some red and drab 

 colored. 



Idaho Territory, on Jordan Creek, in placers, in beautiful rounded 

 masses, from one eighth to half an inch in diameter, verj'- pure and clean 

 — the variety known as wood tin. — (Cabinet of the author, specimens 

 received from Charles T. Blake, Esq., of Idaho City.) 



Mi'xico — State of Durango; wood tin of great purity and beauty occurs 

 abundantly in this State. It closel}^ resemble the stream tin of Idaho. 



CEEUSITE— ( Carlonate of Lead.) 



In large crystals resembling those from Siberia, in the Euss District (?) 

 Great Basin, near the Mojave Eiver; Arizona, in heavy incrusting masses 

 upon the galena of the Castle Dome District. 



CHALCEDONY. 



Large masses of white chalcedony, delicately veined, and in mamilary 

 sheets, occur in Monterey County, near the Panoch^s. On Walker Eiver, 

 Washoe; and of a fine pink color near Aurora, Esmeralda. In pear 

 shaped nodules in the eruptive rocks between Williamson's Pass and 

 Johnson's Eiver, Los Angeles County. 



