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ment will form one of the most extensive of our mining departments; and it is well worth the notice of owners of such property.

These remarks may well be closed with a few words on the impolicy of devoting a life-time to making multitudinous locations rather than endeavoring to extract from some of them the wealth which they contain. The number of locations made in the State may be set down at not far short of forty thousand, and the population at somewhere near the same figure, or at the rate of one mine to every one of our inhabitants. Looking at this fact, it is evident that not only our hands, but those of many generations after us, can find employment on the mining ground already located; yet it is doubtful if one-tenth of the property has been even partially developed. There is enough wealth already discovered in our State to make us all rich, if we will but work to secure the coveted prize; and the end will be obtained more quickly and a thousand times more certainly, than by scouring the country in the hope of making the "big strike" which allures too many of our prospectors.

APPENDIX "C."

CATALOGUE OF THE PRINCIPAL MINERALS FOUND IN NEVADA.

APPENDIX "C."

CATALOGUE OF THE PRINCIPAL MINERALS FOUND IN NEVADA.

AGATE.-See Quartz.

ALABASTER.-See Gypsum.

ALUM. Esmeralda County.-Twelve miles north of Silver Creek, alum is found in thin, comby seams, from the thickness of a knife blade up to several inches, traversing extensive sulphur deposits in every direction.

Storey County.-Impregnating the water of springs near the Truckee River, some sixteen miles north of Virginia.

AMETHYST.-See Quartz.

ANTIMONY, GRAY.-See Sulphuret Antimony.

ANTIMONY, SULPHURET.-An abundant mineral in the Humboldt mining region, occurring largely in the Sheba, American Basin, De Soto, and other mines, and usually rich in silver. It is also found in the mines of Aurora, Esmeralda County, and in the vicinity of Walker Lake.

ARSENICAL ANTIMONY-" Ophir Mine, Nevada. In reniform, finely crystalline, somewhat radiated masses, of a color between tin white and iron black on a fresh fracture, but grayish black from tarnishing; associated with arsenolite, calcite, and quartz." (Blake's Cal. Minerals, from F. A. Genth, Am. Jour. Sev. (2) xxxiii, 190.)

ARSENOLITE.-Reported from the Ophir Mine, Virginia, with arsenical antimony (Genth).

Blende, or SULPHURET OF ZINC-Occurs sparingly in the ores of the Comstock vein, Virginia, associated with sulphuret of silver, copper and iron pyrites, galena, etc. In some of the rich ores from the Ophir and California mines, at the northern end of the lode, the per centage of zinc ranges as high as eleven to fourteen. At the southern extremity of the vein it is scarcely present (see analysis, page 135). It is abundant in the ores from the Sheba Mine, Humboldt County, associated with gray antimony and brittle silver ore.

BLACK OXYDE OF COPPER.-See Copper.

BORATE OF LIME. This mineral is found quite extensively in the salt marsh of the Columbus Mining District, Esmeralda County, principally in layers from two

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