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 68
... usually neces- sary for him to prepare one from the deeds to its component tracts as recorded at the county seat . A large property is usually 68 SURVEYING 68; Preliminary Work, 68; Angular Measurements, 69; Dista.
... usually neces- sary for him to prepare one from the deeds to its component tracts as recorded at the county seat . A large property is usually 68 SURVEYING 68; Preliminary Work, 68; Angular Measurements, 69; Dista.
Página 83
... usually ) mine surveying methods are absolutely distinct . There is , in all underground work , a difference in the organization of the corps and con- sequently in some minor details in carrying on the work , depending on whether the ...
... usually ) mine surveying methods are absolutely distinct . There is , in all underground work , a difference in the organization of the corps and con- sequently in some minor details in carrying on the work , depending on whether the ...
Página 91
... usually possible to locate the one by measurements made through the cross- cuts from the other and a separate line must be run in each . In case it is possible to locate the air - course by means of offsets from the main gangway , a ...
... usually possible to locate the one by measurements made through the cross- cuts from the other and a separate line must be run in each . In case it is possible to locate the air - course by means of offsets from the main gangway , a ...
Página 116
... usually 8 ft . 6 in . , and at the ends the ballast will slope down to subgrade . The extra width required for this will be about 1 or 2 ft . at each end of the tie . Usually , the embankment is widened for about 2 ft . beyond the ...
... usually 8 ft . 6 in . , and at the ends the ballast will slope down to subgrade . The extra width required for this will be about 1 or 2 ft . at each end of the tie . Usually , the embankment is widened for about 2 ft . beyond the ...
Página 126
... usually meant . The BWC bent rails wr are called wing rails ; the narrowest part mp of the frog is called the throat . The throat of the frog must be wide enough to allow the flanges of the wheels to pass through ; it is usually made ...
... usually meant . The BWC bent rails wr are called wing rails ; the narrowest part mp of the frog is called the throat . The throat of the frog must be wide enough to allow the flanges of the wheels to pass through ; it is usually made ...
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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.