I.C.S. Reference Library: A Series of Textbooks ..., Τόμος 251905 |
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advantage amount angle bed-rock blasting blocks bolts bottom brake brake band cage caisson caps carried caving claim clutch band conical drums cribbing cylinder deposit depth diameter distance drift drill driven drum dump employed engine explosive factor of safety feet filling flume force gold gravel ground ground sluicing head-frame hoisting holes illustrates inches incline iron length load lode lower material means metal mines method mine-cars miner's inches mineral necessary nitroglycerin opening operation Paleozoic pass pipe placed placer deposits placer mining plank plant plate portion posts pounds pressure prospecting prospector pumping removed riffles rock rope shaft sheave shovel shown in Fig side sinking skip slope sluice sometimes square steel stope strap stream stulls surface timbering tion track trepan tunnel upper usually vein ventilation vertical water sapphire weight weir wheel
Δημοφιλή αποσπάσματα
Σελίδα 25 - ... each of these three posts must be written the name of the claim, the name of the locator, and the date of location. On No. 1 post, in addition, the following must be written : " Initial post. Direction of post No. 2 [giving approximate compass bearing] ; feet of this claim lie on the right, and feet on the left of the line from No. 1 to No. 2 posts.
Σελίδα 17 - STATES PRACTICE. 41. Size of Claim. — If, as the result of his investigations, the prospector considers the deposit a promising one, he proceeds to " locate " it according to the laws of the district in which the property lies. The mining laws of the United States limit the dimensions of a lode claim to 1,500 feet along the course of the vein by 600 feet wide, horizontal distance — 300 feet on each side of the center of the vein at the discovery shaft. In Colorado, the State Legislature has fixed...
Σελίδα 56 - ... foundation should be solid rock. Gravel is better than earth, but when gravel is employed, it will be necessary to drive sheet piling under the upper toe of the dam to prevent water from seeping through the formation under the dam. Vegetable soil...
Σελίδα 9 - The location of a lode consists in defining its position and boundaries, and in doing such acts as indicate and publish the intention to occupy and hold it under the license of the United States. The formal parts of location include: 1, the location notice at discovery; 2, the discovery shaft; 3, the boundary stakes.
Σελίδα 96 - ... by gravity. The loaded cars run in by gravity around the curve to the foot of the slope, in position to be attached to the rope. In ascending, the loaded car forces its way through the spring switch, or the switch may be set by a lever located at the foot of the slope.
Σελίδα 85 - Giants, or nozzles. Pipes used for carrying water across depressions and placed so as to follow the natural surface of the ground are called inverted siphons. The thickness of the metal for pipes is determined by the pressure of the water and the diameter of the pipe. The pipe, when put together, soon becomes water-tight from the foreign matter in the water. This result may be hastened by throwing in a few bags of sawdust.
Σελίδα 67 - Table 46, of 110 tons, almost three times as much as the wrought-iron rope. 2525. Round Ropes. — Round ropes are much more generally used than either flat or tapered ropes. There are two kinds of them manufactured, one being more pliable than the other. The first of these contains nineteen wires in a strand, and has six strands wound around a hemp center. These are generally used for hoisting and power transmission because they are very pliable. The other kind contains seven wires in a strand,...
Σελίδα 30 - Act for the purpose of erecting thereon any machinery or other works for transporting, crushing, reducing, or sampling ores, or for the transmission of power for working mines. " Streams " shall include all natural watercourses, whether usually containing water or not, and all rivers, creeks, and gulches. " Ditch " shall include a fume, pipe, or race, or other artificial means for conducting water by its own weight, to be used for mining purposes.
Σελίδα 28 - ... boxes and a small quantity distributed through all, except the last 400 feet of the line. In the case of a 6-foot sluice, the first charge may require as much as three flasks. The undercurrents are charged at the same time, and a small amount of quicksilver put into the tailings sluice. Quicksilver is added daily during the run, in gradually lessening quantities, the object being to keep the surface of the mercury uncovered and clean on the riffles in the upper portion of the sluice. Hence the...
Σελίδα 25 - ... localities boundary-lines of a placer claim shall be blazed so that the posts can be distinctly seen, underbrush cut, and the locator shall also erect legal posts not more than 125 feet apart on all boundary-lines. In localities where there is no timber or underbrush, monuments of earth and rock, not less than 2 feet high and 2 feet in diameter at base, may be erected in lieu of the last-mentioned legal posts, but not in the case of the four legal posts marking the corners of the claim: A placer...