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
... allowed to project 1 or 2 in . above the rock . The bolt is center - punched the same as would be a rail . Sometimes the projecting end of the bolt is threaded so that a cap may be screwed upon it to protect the center . This is a good ...
... allowed to project 1 or 2 in . above the rock . The bolt is center - punched the same as would be a rail . Sometimes the projecting end of the bolt is threaded so that a cap may be screwed upon it to protect the center . This is a good ...
Página 74
... allowed to touch them . The bubble should then be brought over each pair of leveling screws successively , and the instrument leveled in each position , any correction being made in the adjustments that may appear necessary . Care ...
... allowed to touch them . The bubble should then be brought over each pair of leveling screws successively , and the instrument leveled in each position , any correction being made in the adjustments that may appear necessary . Care ...
Página 132
... allowed to vary a little in gauge to prevent a kink from showing opposite the frog . In case the gauge is widened at the frog , increase the guard - rail distance an equal amount . For a gauge 4 ft . 8 in . , place the side of the guard ...
... allowed to vary a little in gauge to prevent a kink from showing opposite the frog . In case the gauge is widened at the frog , increase the guard - rail distance an equal amount . For a gauge 4 ft . 8 in . , place the side of the guard ...
Página 144
... allowed to remain in the shade for , say , 5 min . before being read , that all its parts may have time to assume the temperature of the air at the station . PRACTICAL PROBLEMS IN SURVEYING 1. To Prolong a Straight Line . Let AB , Fig ...
... allowed to remain in the shade for , say , 5 min . before being read , that all its parts may have time to assume the temperature of the air at the station . PRACTICAL PROBLEMS IN SURVEYING 1. To Prolong a Straight Line . Let AB , Fig ...
Página 168
... allowed to drip off the axles and on to the ground . When axles are equipped in the same manner as those of freight cars , or where cars are equipped with one of the several different styles of patent car wheels and axles that are ...
... allowed to drip off the axles and on to the ground . When axles are equipped in the same manner as those of freight cars , or where cars are equipped with one of the several different styles of patent car wheels and axles that are ...
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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.