The Field Engineer: A Handy Book of Practice in the Survey, Location, and Trackwork of Railroads; Containing ... Rules and Tables ... Applicable to ... the Standard and the Narrow Gauge ...D. van Nostrand, 1880 - 318 páginas |
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Página x
... height in levelling . F. S. Foresight , in transit work ; or the reading of the rod to ascertain elevations in levelling . H. I. Height of instrument : elevation of the level above the datum or zero plane . H. W. High water . L. W. Low ...
... height in levelling . F. S. Foresight , in transit work ; or the reading of the rod to ascertain elevations in levelling . H. I. Height of instrument : elevation of the level above the datum or zero plane . H. W. High water . L. W. Low ...
Página xi
... for the earth's curvature and refrac- tion · · To find differences in elevation by means of the barometer Heights by the thermometer 25 25 285 26 28 8835 29 29 xi XII . Setting slope stakes XIII . Vertical curves XIV.
... for the earth's curvature and refrac- tion · · To find differences in elevation by means of the barometer Heights by the thermometer 25 25 285 26 28 8835 29 29 xi XII . Setting slope stakes XIII . Vertical curves XIV.
Página 27
... height ” at C = 201.41 , the height of sta . 2 , 2.64 = 204.05 , and the elevations at 3 , 4 , 5 , or other points observed from C are found by deducting the " rods " at those points from the ascertained instrument height at the new ...
... height ” at C = 201.41 , the height of sta . 2 , 2.64 = 204.05 , and the elevations at 3 , 4 , 5 , or other points observed from C are found by deducting the " rods " at those points from the ascertained instrument height at the new ...
Página 28
... height . In foul weather the rodman should take care that the foot of the rod does not ball up with mud or snow . The leveller should have his cross - hairs free from parallax , the tar- get in focus , and see his bubble true at the ...
... height . In foul weather the rodman should take care that the foot of the rod does not ball up with mud or snow . The leveller should have his cross - hairs free from parallax , the tar- get in focus , and see his bubble true at the ...
Página 29
... height . If not so differ- enced , questions of detour , of approaches , and the like , will contribute to determine the expediency of making an instru- mental examination . 13. HEIGHTS BY THE THERMOMETER . Tthe difference , in degrees ...
... height . If not so differ- enced , questions of detour , of approaches , and the like , will contribute to determine the expediency of making an instru- mental examination . 13. HEIGHTS BY THE THERMOMETER . Tthe difference , in degrees ...
Otras ediciones - Ver todas
The Field Engineer: A Handy Book of Practice in the Survey, Location and ... William F. Shunk Sin vista previa disponible - 2008 |
The Field Engineer: A Handy Book of Practice in the Survey, Location, and ... William Findlay Shunk Sin vista previa disponible - 2017 |
Términos y frases comunes
100 feet long 100-feet chords adjustment apex distance called central angle column Cosine 1 Sine Cotang cross-hair Cube Roots decimals deflection distance degree of curvature DEGREE OF CURVE Diff divided elevation engineer equal Example feet figure fixed foregoing frog angle Full Gauge gauge of track gauge side gent ground index angle instrument intersection angle length of switch-rail located logarithm M.
M. I Sine Main frog dist mantissa mark measure method middle frog middle ordinate middle point minutes Multiply observation outer rail parallel perpendicular quotient radii radius range Reciprocals REVERSED CURVE right triangle screws slope Square Roots standard gauge straight line sub-chord subtended Subtract Suppose Table XVI tabular tance Tang tangent A B tangential angle tangential distance telescope terminal tangent tion toe of switch Trigonometry turnout curve vernier versin vertical ΙΟ ΤΑΝ
Pasajes populares
Página 18 - ... the square of the hypothenuse is equal to the sum of the squares of the other two sides.
Página 4 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Página 11 - ... is supposed to be divided into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. Degrees, minutes, and seconds, are designated respectively, by the characters ° ' ". For example, ten degrees, eighteen minutes, and fourteen seconds, would be written 10° 18
Página 4 - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers. log» MN = log» M + log