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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Resultados 6-10 de 15
Página 69
... subtracting 18 ° 45 ' , the reading in tangent at the last turning - point , we have 48 ° 45 ' , the required index angle , as before . The reasons for the rule will be obvious from an examina- tion of the figure . 13. Being in tangent ...
... subtracting 18 ° 45 ' , the reading in tangent at the last turning - point , we have 48 ° 45 ' , the required index angle , as before . The reasons for the rule will be obvious from an examina- tion of the figure . 13. Being in tangent ...
Página 93
... the difference to half the sum , the larger angle , A , is found to be 5 ° 26 ' ; subtracting half the difference from half the sum , the smaller angle , D , is found to be 1 ° 33 ' . The 93 length of the side A D may be found in.
... the difference to half the sum , the larger angle , A , is found to be 5 ° 26 ' ; subtracting half the difference from half the sum , the smaller angle , D , is found to be 1 ° 33 ' . The 93 length of the side A D may be found in.
Página 99
... subtract the quotient from unity ; the remainder is the natural cosine of the angle of re- treat along the located curve to the required P. C. C. Example . 3. A 3 ° curve on the ground , to find the P. C. C. of a 5 ° curve striking 27 ...
... subtract the quotient from unity ; the remainder is the natural cosine of the angle of re- treat along the located curve to the required P. C. C. Example . 3. A 3 ° curve on the ground , to find the P. C. C. of a 5 ° curve striking 27 ...
Página 109
... subtracting half the difference from half the sum , the shorter segment , LH , is found to be 541 feet . Then HL HG = 541 910 cos . 53 ° 31 ' = angle GHI . In like manner , dividing IL by IG , we find the angle GIH to be 9 ° 49 ' . The ...
... subtracting half the difference from half the sum , the shorter segment , LH , is found to be 541 feet . Then HL HG = 541 910 cos . 53 ° 31 ' = angle GHI . In like manner , dividing IL by IG , we find the angle GIH to be 9 ° 49 ' . The ...
Página 111
... Subtract the sum of these tangents from the length of the trial line , if it cuts the objective curve ; add the sum , if it passes outside . With the number thus found , divide the measured amount of error for the tangent of the angle ...
... Subtract the sum of these tangents from the length of the trial line , if it cuts the objective curve ; add the sum , if it passes outside . With the number thus found , divide the measured amount of error for the tangent of the angle ...
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