Statistics of Mines and Mining in the States and Territories West of the Rocky Mountains: Being the ... Annual Report, 1. izdajaU.S. Government Printing Office, 1870 |
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Zadetki 1–5 od 93
Stran 7
... lead us to expect . In fact , the decrease in the placer product has been partly counterbalanced by an increased yield from quartz mining ; and it is especially encourag- ing that the causes of decrease have been temporary , like a bad ...
... lead us to expect . In fact , the decrease in the placer product has been partly counterbalanced by an increased yield from quartz mining ; and it is especially encourag- ing that the causes of decrease have been temporary , like a bad ...
Stran 16
... lead ores . The erection of furnaces by Messrs . Belshaw and Judson , and subsequently by many others , has stimulated mining operations greatly , because the poor miners who had no other capital than their labor were thus enabled to ...
... lead ores . The erection of furnaces by Messrs . Belshaw and Judson , and subsequently by many others , has stimulated mining operations greatly , because the poor miners who had no other capital than their labor were thus enabled to ...
Stran 17
... lead carrying generally from twenty - eight to fifty- five per cent . of lead , and much silver . Freiberg . This mine is situated high on Buena Vista Mountain , its tunnels opening on the streets of Cerro Gordo . It consists , so far ...
... lead carrying generally from twenty - eight to fifty- five per cent . of lead , and much silver . Freiberg . This mine is situated high on Buena Vista Mountain , its tunnels opening on the streets of Cerro Gordo . It consists , so far ...
Stran 18
... lead . It shows a vein of about twelve feet in width , and the height from the head of the tunnel to the highest point on the vein is about six hun- dred and fifty feet , from all of which ore can be taken out through the tunnel . The ...
... lead . It shows a vein of about twelve feet in width , and the height from the head of the tunnel to the highest point on the vein is about six hun- dred and fifty feet , from all of which ore can be taken out through the tunnel . The ...
Stran 19
... lead , with antimony . The vein is one thousand feet in length , and can be made to supply fifteen to twenty tons of ore per day . Other mines . - The General Lee , twelve hundred feet ; Passport , twelve hundred ; St. André , one ...
... lead , with antimony . The vein is one thousand feet in length , and can be made to supply fifteen to twenty tons of ore per day . Other mines . - The General Lee , twelve hundred feet ; Passport , twelve hundred ; St. André , one ...
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Alpine County amalgamation amount apparatus arrastras assay average Bannack battery bottom bullion California Cañon Cañon City cents chloride claims coal Comstock lode contains copper cost country rock County Creek crushing cylinder deposits depth diameter ditch dollars drift drill east engine explosion extension feet deep feet wide fissure five furnace galena giant powder gold granite Grass Valley gravel Gulch hoisting hole horse-power hundred feet inches iron iron pyrites July labor ledge length lode machine metal metres miles mill miners Mining Company mining district Mountains Nevada opened operations owners patent Pinos Altos piston placer mining pounds pump pyrites quantity quartz quicksilver railroad Reese River reported rich roasting rock running shaft side silver slate smelting stamps steam sulphurets surface Territory tion tons Treasure Hill trepan tunnel Valley valve vein vertical weight White Pine width yield
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Stran 426 - That as a further condition of sale, in the absence of necessary legislation by Congress, the local Legislature of any State or Territory may provide rules for working mines involving easements, drainage, and other necessary means to their complete development ; and those conditions shall be fully expressed in the patent.
Stran 327 - Gold in the Sweetwater district was first discovered in 1842 by a Georgian, who came here with the American Fur Company for the recovery of his health. After remaining a year he started for home, intending to organize a company and bring them to work the mines.
Stran 675 - The quantity of water used per stamphead in crushing varies from 720 gallons to 11,520 gallons per diem of 24 hours. The quantity of mercury used in the ripples per stamper is from 5 to 70 pounds.
Stran 328 - ... some time. When winter approached they abandoned their enterprise to winter at Fort Laramie, where they intended to provision themselves for a year and get a supply of necessary tools in the spring. This done they started, but when on their way two days they were overtaken by United States dragoons and brought back to the fort. The leader was sent to prison for some imaginary offense and the property of the entire company confiscated.
Stran 662 - The proper form of the curvature of the cam is a modified involute of a circle, the radius of which is equal to the horizontal distance between the axis of the cam-shaft and the centre of the stamp-stem. The curvature should be increased or made greater than the regular involute, at each end of the cam.
Stran 259 - ... are excluded from the preemption act of 1841, and which under past legislation are not liable to ordinary private entry, it shall and may be lawful for the President to cause such tracts, in suitable legal subdivisions, to be offered at public sale to the highest bidder, after public notice of not less than three months, at a minimum price of twenty dollars per acre ; and any lands not thus disposed of shall thereafter be liable to private entry at said minimum.
Stran 150 - ... from minute inquiries made of several individuals who were concerned in letting off the water, and of several gentlemen who were present at the legal investigation which it occasioned, I possessed myself of the following facts. Long Lake, before it...
Stran 513 - Om.20 ; and it gives 200 blows per minute. This machine is single-acting. The compressed air enters by the opening in constant communication by the conduit with the front part of the cylinder ; when the piston is at the end of the stroke...
Stran 649 - ... jaws at the bottom limits the size of the fragments. This distance, and consequently the size of the fragments, may be regulated at pleasure. A variation to the extent of five-eighths of an inch may be made by turning the screw-nut P, which raises or lowers the wedge Q, and moves the toggle-block R forward or back.
Stran 409 - Spaniards in the mean time not having turned their attention to mining pursuits for a series of years), succeeding generations were never able to discover them again. Indeed it is now generally credited by the Spanish population. that the Pueblo Indians, up to the present day, are acquainted with the locales of a great number of these wonderful mines, of which they most sedulously preserve the secret.