The Coal and Metal Miners' Pocketbook of Principles, Rules, Formulas, and Tables |
Common terms and phrases
afterdamp airway amount amperes angle anthracite anthracite coal armature bituminous coal boiler bottom brattice breast cage cars chutes circular mils coal column Cosine Sine Cosine Cotang Tang Cotang Cotg culm cylinder Davy lamp deposit diameter distance drill driven drum engine equal explosion face feet firedamp formula friction furnace gangway gases given haulage head hoisting hole horizontal horsepower inches inclined iron L.Tang lamp length load logarithm marsh gas material method Mexican).-A mineral mines minute motor multiply pillars pipe plumb-bob pounds pressure pump pyrites quantity radius resistance revolutions per minute rock roof rope seam shaft sheave side Sine Cosine Sine slope specific gravity speed split square station steam stoping surface Tang Cotang Tang temperature thickness timber track usually vein velocity ventilation vertical water gauge weight wire wire rope
Popular passages
Page 449 - On the restoration of life, when the power of swallowing has returned, a teaspoonful of warm water, small quantities of wine, warm brandy and water, or coffee should be given. The patient should be kept in bed, and a disposition to sleep encouraged.
Page 449 - Repeat these measures alternately, deliberately, and perseveringly, about fifteen times in a minute, until a spontaneous effort to respire is perceived ; immediately upon which cease to imitate the movements of breathing, and proceed to induce circulation and warmth.
Page 105 - Therefore, the specific gravity of a solid or a liquid body is the ratio of its weight to the weight of an equal volume of water...
Page 25 - The square described on the hypotenuse of a rightangled triangle is equal to the sum of the squares described on the sides containing the right angle. Prop. 30. — If the square on one side of a triangle is equal to the sum of the squares on the other two sides, the angle contained by these two sides is a right angle.
Page 32 - Find also the area of the triangle, formed by the chord of the segment and the two radii of the sector.
Page 449 - Silvester's method, as follows : — Place the patient on the back on a flat surface, inclined a little upwards from the feet ; raise and support the head and shoulders on a small firm cushion or folded article of dress placed under the shoulder-blades.
Page 24 - If two triangles have two angles and the included side of the one, equal to two angles and the included side of the other, each to each, the two triangles will be equal.
Page 25 - The circumferences of circles are to each other as their radii, and their areas are to each other as the squares of their radii. Let C denote the circumference of one of j^ff \ B; the circles, R its radius 0A, A its area ; and let C...
Page 24 - We have then this rule, 49. Add to the index, if necessary, such a negative number as will make it exactly divisible by the divisor, and prefix an equal positive number to the decimal part of the logarithm. 1. Required the 5th root of 0.009642.
Page 22 - The base of the common system is 10, and, as a logarithm is the exponent of the power to which the base must be raised in order to be equal to a given number, all numbers are to be regarded as powers of 10; hence, 10° = 1, we have logarithm of 1 = 0.