. The Annual of scientific discovery: or, Year-book of facts in science and art. Industrial arts -- Yearbooks; Science -- Yearbooks. 296 ANNUAL OF SCIENTIFIC DISCOVERY. seven feet, and rich specimens taken from the body of the vein, from the top to the bottom, when the gold was left descending with the earth to an unknown depth. The vein at the foot of the hill has been opened by adits run in on the course of the vein at several places at different heights, and at all these places the gold is found very equally distributed through the rock. In numerous instances the gold is vis- ible to the ey
. The Annual of scientific discovery: or, Year-book of facts in science and art. Industrial arts -- Yearbooks; Science -- Yearbooks. 296 ANNUAL OF SCIENTIFIC DISCOVERY. seven feet, and rich specimens taken from the body of the vein, from the top to the bottom, when the gold was left descending with the earth to an unknown depth. The vein at the foot of the hill has been opened by adits run in on the course of the vein at several places at different heights, and at all these places the gold is found very equally distributed through the rock. In numerous instances the gold is vis- ible to the eye, and seen in very small points, yet in a great mass of the rock there is none visible externally ; but on pounding it in a rnor- tar to a fine powder, and washing it, the yield of gold is so abundant as to remove all doubt as to the propriety of working the rock by ma- ; The San Francisco Herald, in a notice of some of the spe- cimens from the locality, says, — "Several lumps were selected, in which no particle of gold could be discovered, even with a microscope. These were pounded in a mortar, and when reduced to a fineness some- what less than that of common table-salt, were washed in a rude tin pan. Each piece yielded, when so reduced, several grains of gold. The estimated product was twelve cents to the pound of ; Mr. Tyson, in his report to the Secretary of War on the geology of California, says, — "It is not to be expected that the quartz veins throughout the gold region will generally prove metalliferous; on the contrary, but a small proportion of the whole number can be expected to contain metal worth ; He observes that Col. Fremont showed him a specimen from Mariposa River which contained a large proportion of gold disseminated in small masses throughout the stone, but he evidently is of the opinion that the question as to the profitable working of the veins remains to be decided. CRYSTALLIZED GOLD FROM CALIFORNIA. MR
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectindustr, bookyear1851
