Coal Miners' Pocketbook: Formerly The Coal and Metal Miners' Pocketbook; Principles, Rules, Formulas and TablesMcGraw-Hill Book Company, Incorporated, 1916 - 1172 páginas |
Dentro del libro
Resultados 1-5 de 100
Página 29
... carried indefinitely , but with a little practice it will be found that the first approximation answers all practical purposes . = EXAMPLE 1. - Find the cube root of 987,654,321 . SOLUTION . Pointing off and inserting a decimal point ...
... carried indefinitely , but with a little practice it will be found that the first approximation answers all practical purposes . = EXAMPLE 1. - Find the cube root of 987,654,321 . SOLUTION . Pointing off and inserting a decimal point ...
Página 77
... carried by the inter- mediates B , D , F , etc. , to the top , by a series of foresights to C , E , G , etc. The term shaft in American coal - mining practice is applied only to ver- tical openings , though in metal mining , both in the ...
... carried by the inter- mediates B , D , F , etc. , to the top , by a series of foresights to C , E , G , etc. The term shaft in American coal - mining practice is applied only to ver- tical openings , though in metal mining , both in the ...
Página 79
... carried the meridian to a convenient point near the top of the shaft , and having found that the south side of the shaft is the most accessi- ble , determine , with an ordinary string , the location of the point A , from which the ...
... carried the meridian to a convenient point near the top of the shaft , and having found that the south side of the shaft is the most accessi- ble , determine , with an ordinary string , the location of the point A , from which the ...
Página 82
... carry the line from one shaft to another . As the surface and mine temperatures may be very dif- ferent ... carried from one point to the other by the bent plumb - line method . In this case , establish a station at A , the ...
... carry the line from one shaft to another . As the surface and mine temperatures may be very dif- ferent ... carried from one point to the other by the bent plumb - line method . In this case , establish a station at A , the ...
Página 88
... carried up one or both entries of a pair . If each entry has its sights , the O end of the tape should be held at ... carry the 0 end of a tape ( usually a 50 - ft . metallic tape ) to the rib at each side of the cross - cut , and the ...
... carried up one or both entries of a pair . If each entry has its sights , the O end of the tape should be held at ... carry the 0 end of a tape ( usually a 50 - ft . metallic tape ) to the rib at each side of the cross - cut , and the ...
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Otras ediciones - Ver todas
Coal Miners' Pocketbook, Formerly the Coal and Metal Miners' Pocketbook ... Thomas J. Foster Sin vista previa disponible - 2012 |
Términos y frases comunes
amount angle anthracite armature average beam bending bituminous coal boiler bottom British thermal units carbon cars cement center of gravity circuit coal coke column combustion compression concrete cubic curve cylinder diameter distance drill driven electromotive force elevation engine entry equal factor of safety feet formula friction frog fuel gauge given grade haulage head heat hoisting rope holes horizontal horsepower Inches iron length lime load lubrication mantissa material mean effective pressure measured method mines mixture moment of inertia mortar motor obtained pillars pipe piston placed plumb-bob Portland cement Pounds pressure pulley pump radius rail resistance sand seam shaft shear sheaves shown in Fig side slope specific gravity square station steam steel strands strength stress surface switch tangent temperature tests thickness timber track usually valve vertical weight wire
Pasajes populares
Página 3 - SQUARE MEASURE 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet — 1 square yard (sq.
Página 456 - Z is the space between the piston and the cylinder head (when the piston is at the end of the stroke), toi,-i 8 gether with the volume of the steam ports.
Página 412 - Pi = pressure of steam at discharge, in pounds per square inch; L = length of pipe, in feet; d = diameter of pipe, in inches. In...
Página 204 - This term is applied to the finely pulverized product resulting from the calcination to incipient fusion of an intimate mixture of properly proportioned argillaceous and calcareous materials, and to which no addition greater than 3 per cent has been made subsequent to calcination.
Página 6 - Cubic Measure 1728 cubic inches (cu. in.) =1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu. yd.) 128 cubic feet = 1 cord (cd...
Página 34 - Rule. — Divide the logarithm of the number by the index of the root; the result will be the logarithm of the root.
Página 36 - If two triangles have two sides, and the included angle of the one equal to two sides and the included angle of the other, each to each, the two triangles are equal in all respects.
Página 149 - The power multiplied by the distance through which it moves is equal to the weight multiplied by the distance through which it moves. Thus, 20 Ib.
Página 37 - The sum of the interior angles of a polygon is equal to twice as many right angles as the polygon has sides, less four right angles.
Página 303 - The pressure of a liquid on any surface immersed in it is equal to the weight of a column of the liquid whose base is the surface pressed, and whose height is the perpendicular depth of the center of gravity of the surface below the surface of the liquid.