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 28
... greater accuracy be demanded it is possible to interpolate as follows : Number Root 39,390.40463 = 8.35 37,073.98432 = 8.25 Number Root 38,279.63000 = ? 37,073.98432 = 8.25 2,316.42031 = first difference 1,205.64568 = second difference ...
... greater accuracy be demanded it is possible to interpolate as follows : Number Root 39,390.40463 = 8.35 37,073.98432 = 8.25 Number Root 38,279.63000 = ? 37,073.98432 = 8.25 2,316.42031 = first difference 1,205.64568 = second difference ...
Página 30
... greater than unity , they are positive . Negative characteristics are expressed by the sign , placed above the figures ; thus , log .20 = 1.30103 . Rule for Characteristics . The characteristic of the logarithm of a number equal to or ...
... greater than unity , they are positive . Negative characteristics are expressed by the sign , placed above the figures ; thus , log .20 = 1.30103 . Rule for Characteristics . The characteristic of the logarithm of a number equal to or ...
Página 31
... greater , increase the fifth figure by 1 and write ciphers in place of the sixth and remaining figures . II . Find the mantissa corresponding to the logarithm of the first four figures , and subtract this mantissa from the next greater ...
... greater , increase the fifth figure by 1 and write ciphers in place of the sixth and remaining figures . II . Find the mantissa corresponding to the logarithm of the first four figures , and subtract this mantissa from the next greater ...
Página 36
... greater side is opposite the greater angle , and the greater angle is opposite the greater side . 8 . The sum of the lengths of any two sides of a triangle is greater than the length of the third side . 9 . In an isosceles triangle ...
... greater side is opposite the greater angle , and the greater angle is opposite the greater side . 8 . The sum of the lengths of any two sides of a triangle is greater than the length of the third side . 9 . In an isosceles triangle ...
Página 38
... greater than the distance from C to AB , describe an arc cutting the line AB at A and B. From A and B as centers and with a radius greater than one - half of AB , describe arcs intersecting at D , and draw the line CD . 4+ C E B XD FIG ...
... greater than the distance from C to AB , describe an arc cutting the line AB at A and B. From A and B as centers and with a radius greater than one - half of AB , describe arcs intersecting at D , and draw the line CD . 4+ C E B XD FIG ...
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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.