STATE AGRICULTURAL SOCIETY. 347 



taken from the Middle Fork of the American Eiver, about two miles 

 from Michigan Bluifs, Placer County. 



The Carson Hill quartz claim, in Calaveras County, is celebrated for 

 the size and weight of the masses of gold taken from it, some of which 

 weighed six and seven pounds. (For further observations upon gold, its 

 geology, and distribution, see an article at the end.) 



GOLD AND TELLUEIUM. 



' (See Tellurium.) 



GEAY COPPER OEE. 



With gold in the Pine Tree Mine, Mariposa Grant, and similarly at 

 the lona Company's claim, and others upon the same belt near Coulter- 

 ville. (See Tetrahedrite.) 



GEAPHITE. 



About twenty miles above the Big Tree Grove, in crystalline scales ; 

 also at the mine of the Eureka Plumbago Company, (locality not 

 known.) 



GYPSUM. 



Los Angeles County^ in the Great Basin, near the entrance to the Sole- 

 dad or " New Pass." San Diego County^ along the banks of Carizzo 

 Creek, and on the slope of the Desert. Tulare County, at the vein of 

 stibnite, in crystals. Nevada County, near the Truckee Pass, in beauti- 

 ful stellar radiations, from one half of an inch to three inches in diame- 

 ter. (Cabinet of C. \Y. Smith, Grass Valley.) 



HEMATITE— (/S^ecitZar Iron Ore.) 



This is a very abundant ore in California, and Arizona on the Colo- 

 rado Eiver, near Williams' Fork. Some of the dry arroyos or caSons in 

 that region are ci-owded with blocks of the pure ore, from one to two 

 feet in diameter. It is broken from beds and seams in an impure raetu- 

 morphic limestone. The structure is granular, passing into micaceous, 

 and freshly broken surfaces are extremely brilliant. Specimens of simi- 

 lar ore were brought in by Jules Marcou, in eighteen hundred and fifty- 

 three, from the valley of Williams' Fork, further north. This ore occurs 

 also in Humboldt Valley, and abundantly on the coast of Mexico, south 

 of Acapulco. 



HESSITE. 



El Dorado County, (see Telluret op Silver.) 



HOENBLENDE. 



At San Pablo. At Soledad, in syenite. At Vallecito, near Murphy's. 



HYALITE. 



Associated with semi-opal, in the Mount Diablo range, about thirty 

 miles south of Mount Diablo. (In cabinet of J. B. Meader, Stockton.) 



