Mining and Engineering World, Band 29Mining and Engineering World, 1908 |
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Beliebte Passagen
Seite 108 - ... it shall be unlawful for any person,' persons, or corporation to offer, grant, or give or to| solicit, accept, or receive any rebate, concession, or discrimination in respect of the transportation of any property in interstate or foreign commerce...
Seite 24 - I HOLD every man a debtor to his profession; from the which, as men of course do seek to receive countenance and profit, so ought they of duty to endeavour themselves, by way of amends, to be a help and ornament thereunto.
Seite 63 - If by any reasonable construction, in view of the surrounding circumstances, the language employed in the description will impart notice to subsequent locators, it is sufficient.
Seite 53 - ... proposed for it. In veins of slip-fiber asbestos the fiber lies parallel to the vein walls and marks a plane of fracture along which the two sides have slipped upon each other and given direction to the development of the fiber. Cross-fiber asbestos extends directly across the vein which it forms. The mass fiber is not in veins, but forms the whole mass of the rock, in which veins of slip or cross fiber may occur. As a matter of fact, however, where mass fiber is best developed veins of slip...
Seite 226 - The rest of the coal, distinguished locally as "bituminous," is classed as coking and gas coal, though it is not of sufficiently high grade to compete for those uses with the high-grade coking and gas coals from the East. As a steam coal it competes successfully with the Appalachian coals where the freight rates are slightly in its favor.
Seite 303 - ... (3) His interest in the claim may also be forfeited by his abandonment, with an intention to renounce his right of possession. It cannot be doubted that an actual abandonment of possession by a locator of a mining claim, such as would work an abandonment of any other easement, would terminate all the right of possession which the locator then had.
Seite 63 - ... notice, setting forth the fact that the ground was unoccupied mineral land of the United States at the time of his location, when introduced in evidence in an adverse suit, makes a prima facie case of such fact.
Seite 25 - To find the diameter of a pump cylinder to move a given quantity of water per minute (100 feet of piston being the standard of speed), divide the number of gallons by 4 then extract the square root, and the product will be the diameter in inches of the pump cylinder. To find quantity of water elevated in one minute...
Seite 263 - In jigs treating grains larger than 10 mm., the ore falls on sorting-tables of perforated iron sheets. The jigs have two discharge-pipes, one for each compartment, and the division between the compartments is raised only as high as the pipe, to allow free movement to the upper layer. The first pipe discharges principally a mixture of galena, barite, and cerussite; the second discharges smithsonite and calamine. Sorting on the outside tables gives finished products. The jigs with five compartments,...
Seite 13 - ... about 200 feet in each direction from the shaft, and the ground is blocked off by crosscuts having a variable length up to about 100 feet. Fortunately, but little timbering is generally required. Where the ground is weak, pillars are left at intervals of about 25 feet when working back the faces. Ordinarily, as mining commences at the extreme limit of the area to be worked, the ground from which the pay dirt has been removed is allowed to settle if it will. Experience has shown that settling...