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 34
... gives -.11726 ; then , adding +1 and -1 , log .81.211.88274 . Third Method . Multiplying the characteristic and mantissa separately gives - 1.21 + 1.09274 . Adding the decimal part of the characteristic to the mantissa gives - 1 + ...
... gives -.11726 ; then , adding +1 and -1 , log .81.211.88274 . Third Method . Multiplying the characteristic and mantissa separately gives - 1.21 + 1.09274 . Adding the decimal part of the characteristic to the mantissa gives - 1 + ...
Página 48
... give the area of the figure . Seventh Method . If the area of many irregular figures ( such as a series indicator diagrams ) is to be determined , a planimeter should be secure This instrument , of which there are several types , and ...
... give the area of the figure . Seventh Method . If the area of many irregular figures ( such as a series indicator diagrams ) is to be determined , a planimeter should be secure This instrument , of which there are several types , and ...
Página 61
... give the same result when plotted ; but the first is much quicker , as the boundaries of a tract are frequently overgrown with bushes that must be cleared to allow a sight ; while a central point can frequently be found that will allow ...
... give the same result when plotted ; but the first is much quicker , as the boundaries of a tract are frequently overgrown with bushes that must be cleared to allow a sight ; while a central point can frequently be found that will allow ...
Página 70
... give them any idea as to its direction ; whereas , every layman understands the meaning of the equivalent bearing , S 86 ° 10 ' W. For this reason it seems better to give the bearings of lines instead of their azimuths . Distance ...
... give them any idea as to its direction ; whereas , every layman understands the meaning of the equivalent bearing , S 86 ° 10 ' W. For this reason it seems better to give the bearings of lines instead of their azimuths . Distance ...
Página 81
... gives more latitude in working . After clamping , the I squares are slid along the straightedge until close to the ... give the coordinates of the instrument at D with the greatest precision , the angle ADC and the distance AD should ...
... gives more latitude in working . After clamping , the I squares are slid along the straightedge until close to the ... give the coordinates of the instrument at D with the greatest precision , the angle ADC and the distance AD should ...
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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.