A Treatise on Coal Mining: Prepared for Students of the International Correspondence Schools, Scranton, Pa. ...Colliery Engineer Company, 1900 - Coal mines and mining |
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acid gas airway atoms base called carbonic acid carbonic acid gas cent chord cipher circle coal combustion compass cosine cotangent cube root cubic feet cubic foot Davy lamp decimal places denominator diameter difference distance divided dividend divisor downcast equal EXAMPLE.-What EXAMPLES FOR PRACTICE explosion feet of air feet per minute feet per second firedamp flame formula fraction frustum gases given Hence horsepower hydrogen hypotenuse increased lamp length marsh-gas measured meridian minuend motive column multiplied nitroglycerine orifice pennyweights perimeter perpendicular pounds per square pressure per square proportion quantity of air quotient radius ratio remainder result right angles right-angled triangle rubbing surface safety-lamp scale second figure sectional area side sine SOLUTION specific gravity split square feet square foot square inch subtract tangent temperature units velocity ventilating pressure vernier vernier scale volume water-gauge weight whole number
Popular passages
Page 41 - 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...
Page 39 - No claim shall extend more than three hundred feet on each side of the middle of the vein at the surface...
Page 10 - LIQUID MEASURE 4 gills (gi.) = 1 pint (pt.) 2 pints — 1 quart (qt...
Page 41 - 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 live dollars per acre, and that no adverse claim exists...
Page 40 - ... 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...
Page 48 - The first and fourth terms of a proportion are called the extremes; and the second and third terms the means. Thus, in the proportion a : b = с : d, a and d are the extremes, and b and с the means.
Page 4 - 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.
Page 44 - 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.
Page 40 - A patent for any land claimed and located for valuable deposits may be obtained in the following manner...
Page 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.