. Annual report . Slabs of silver from the Trethewey Mine, location J B 7. The slab standing up-right is the 79-pound specimen referred to in the text. Per cent. Silver Cobalt Nickel 41 Iron Arsenic Antimony Sulphur 22 Calcium carbonate Magnesium carbonate insoluble 1913 Cobalt = INickel Arsenides and Silver M The value of the silver in this 79-lb. sample, at 54 cents an ounce Troy, is $410Crown Reserve Mine.—The specimen from this mine in the collection consists ofa block of ore about 2 feet in diameter, weighing 1,259 lb. The fine Bilver content wasde
. Annual report . Slabs of silver from the Trethewey Mine, location J B 7. The slab standing up-right is the 79-pound specimen referred to in the text. Per cent. Silver Cobalt Nickel 41 Iron Arsenic Antimony Sulphur 22 Calcium carbonate Magnesium carbonate insoluble 1913 Cobalt = INickel Arsenides and Silver M The value of the silver in this 79-lb. sample, at 54 cents an ounce Troy, is $410Crown Reserve Mine.—The specimen from this mine in the collection consists ofa block of ore about 2 feet in diameter, weighing 1,259 lb. The fine Bilver content wasdetermined by specific gravity to be 2,454 Troy ounces. The value of the specimen at. Fig. 19.—Coniagas Sample,the time of purchase, October, 1908, silver at cents an ounce, was $1, Theore consists essentially of native silver and calcite, together with a small includedblock of Cobalt slate-like greywacke. The specimen shows the vein at the pointfrom which it was taken to have had a width of over 2 feet, which is large for aCobalt vein. The specific gravity is M (II) $2 Bureau of Mines No. 4 ff< m Claim.—What may be called a somewhat irregular slab of ore, 5 feet in length1 -. 2 feet in width and about 1 foot thick, was found in the loose, glacial deposits whenprospecting on this claim. It weighs 1,640 lb. and contains, by specific gravity deter-mination, 9,715 Troy ounces of fine silver. At the time of purchase, January, 1910, thevalue of the specimen was approximately $5,000, silver then being worth centsan ounce. While the Trethewey and Crown Reserve specimens are of fresh ore blasted outof the vein, the Gem specimen represents mater
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
