Statistics of Mines and Mining in the States and Territories West of the Rocky Mountains, Volum 2U.S. Government Printing Office, 1870 |
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Side 479
... metre of gravel by the several methods usually em- ployed was : * . By the pan ( about ) ... By the rocker ( about ) ... metres of gravel were worked over with an expense for : * Water ..... Manual labor .. Sundries ( about ) Total ...
... metre of gravel by the several methods usually em- ployed was : * . By the pan ( about ) ... By the rocker ( about ) ... metres of gravel were worked over with an expense for : * Water ..... Manual labor .. Sundries ( about ) Total ...
Side 511
... metres , and worked nine drilling machines with a force of two and a half horse- power each . The tube , like that at the Hoosac , was nearly eight inches in diameter . The air was compressed to six atmospheres , and its veloc- ity in ...
... metres , and worked nine drilling machines with a force of two and a half horse- power each . The tube , like that at the Hoosac , was nearly eight inches in diameter . The air was compressed to six atmospheres , and its veloc- ity in ...
Side 512
... metres long and 17 cubic metres capacity . The air compressors at Modane ( north side ) are composed of a hori zontal cylinder full of water , in which a piston works , and of two verti cal cylinders receiving the air , and provided ...
... metres long and 17 cubic metres capacity . The air compressors at Modane ( north side ) are composed of a hori zontal cylinder full of water , in which a piston works , and of two verti cal cylinders receiving the air , and provided ...
Side 514
... metres wide by 3 metres high , equal to an area of 12 square metres . Eighty holes are bored , 6 of 0.09 and 74 of 0.04 diameter , and 0.90 deep . The daily work has varied evidently according to the hardness of the rock . In March ...
... metres wide by 3 metres high , equal to an area of 12 square metres . Eighty holes are bored , 6 of 0.09 and 74 of 0.04 diameter , and 0.90 deep . The daily work has varied evidently according to the hardness of the rock . In March ...
Side 515
... metres . Upon hard granite , in trials with the drill , it bored 2 metres in 1 hour . The drill is impelled by compressed air , in a cylinder similar to that of Döring's machine , but without an automatic advance movement . It gives ...
... metres . Upon hard granite , in trials with the drill , it bored 2 metres in 1 hour . The drill is impelled by compressed air , in a cylinder similar to that of Döring's machine , but without an automatic advance movement . It gives ...
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Statistics of Mines and Mining in the States and Territories West ..., Utgave 1 Uten tilgangsbegrensning - 1870 |
Statistics of Mines and Mining in the States and Territories West of the ... Rossiter Worthington Raymond Uten tilgangsbegrensning - 1870 |
Vanlige uttrykk og setninger
Alpine County amalgamation amount apparatus arrastras assay average Bannack battery bottom bullion cable 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
Populære avsnitt
Side 425 - That whenever any person or association of persons claim a vein or lode of quartz, or other rock in place, bearing gold, silver, cinnabar, or copper...
Side 425 - That no location hereafter made shall exceed two hundred feet in length along the vein for each locator, with an additional claim for discovery to the discoverer of the lode, with the right to follow such vein to any depth with all its dips, variations, and angles, together with a reasonable quantity of surface for the convenient working of the same, as fixed* by local rules.
Side 327 - He never reached his home, however, and was supposed to have been killed by the Indians. Thirteen years elapsed, when a party of forty men arrived here. They prospected the whole length of the Sweetwater, found gold everywhere in the river as well as in all of its tributaries, and turned the main stream from its channel 400 yards.
Side 425 - ... enter such tract and receive a patent therefor, granting such mine, together with the right to follow such vein or lode with its dips, angles, and variations to any depth, although it may enter the land adjoining, which land adjoining shall be sold subject to this condition.
Side 425 - All valuable mineral deposits in lands belonging to the United States, both surveyed and unsurveyed, are hereby declared to be free and open to exploration and purchase, and the lands in which they are found to occupation and purchase, by citizens of the United States...
Side 425 - That the mineral lands of the public domain, both surveyed and unsurveyed, are hereby declared to be free and open to exploration and occupation by all citizens of the United States, and those who have declared their intention to become citizens, subject to such regulations as may be prescribed by law, and subject also to the local customs or rules of miners in the several mining districts, so far as the same may not be in conflict with the laws of the United States.
Side 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 home, intending to organize a company and bring them here to work the mines.
Side 425 - ... file in the local land office a diagram of the same, so extended laterally or otherwise as to conform to the local laws, customs, and rules of miners, and to enter such tract and receive a patent therefor, granting such mine...
Side 627 - Each size will break any stone, one end of which can be entered into the opening between the jaws at the top. The size of the machine is designated by the size of this opening; thus, if the width of the jaws be 15 inches, and the distance between them at the top 9 inches, the size is called 15 by 9.
Side 653 - 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.