## A Textbook on Mining Engineering, Volumen1 |

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airway amount atoms base bearing body calculated called carbonic cause cent circle coal column contains cosine cubic feet cubic foot curve decimal denominator determined diameter difference direction distance divided draw entry equal example explosion expressed fall feet per minute figure flame force formula four fraction gases given gives greater Hence inches increased lamp length less means measured method mines minute multiplied nearly necessary notes obtained opposite pass pounds per square PRACTICE pressure produced proportion quantity radius ratio reading reduced remaining represent resistance result right angles root rule scale shaft shown side sine SOLUTION split square foot station survey taken tangent temperature tion triangle unit varies velocity ventilating volume weight

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Página 27 - States surveyor-general that five hundred dollars' worth of labor has been expended or improvements made upon the claim by himself or grantors; that the plat is correct, with such further description by such reference to natural objects or permanent monuments as shall identify the claim, and furnish an accurate description to be incorporated in the patent. At the expiration of the sixty days of publication the claimant shall file his affidavit, showing that the plat and notice have been posted in...

Página 25 - ... feet on each side of the middle of the vein at the surface, except where adverse rights existing on the tenth day of May, eighteen hundred and seventytwo, render such limitation necessary.

Página 27 - If no adverse claim shall have been filed with the register and the receiver of the proper land office at the expiration of the sixty days of publication, it shall be assumed that the applicant is entitled to a patent, upon the payment to the proper officer of five dollars per acre, and that no adverse claim exists...

Página 26 - ... and shall post a copy of such plat, together with a notice of such application for a patent, in a conspicuous place on the land embraced in such plat previous to the filing of the application for a patent, and shall file an affidavit of at least two persons, that such notice has been duly posted...

Página 12 - A circle is a plane figure bounded by a curved line, called the circumference, every point of which is equally distant from a point within called the center.

Página 26 - Therefore, multiplying both terms of a fraction by the same number does not alter its value.

Página 32 - The terms of a ratio are the two numbers to be compared ; thus, in the above ratio, 20 and 4 are the terms. When both terms are considered together, they are called a couplet ; when considered separately, the first term is called the antecedent, and the second term the consequent. Thus, in the ratio 20 : 4, 20 and 4 form a couplet, and 20 is the antecedent, and 4 the consequent.

Página 26 - A patent for any land claimed and located for valuable deposits may be obtained in the following manner...

Página 12 - The number thus added to itself, or the number to be multiplied, is called the multiplicand. The number which shows how many times the multiplicand is to be taken, or the number by which we multiply, is called the multiplier.

Página 50 - Divide the continued product of the mean effective pressure in pounds per square inch, the length of the stroke in feet, the area of the piston in square inches, and the number of strokes per minute by 33,000; the result will be the horsepower.