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 14
... equivalent to that of its supplement , or 61 ° 41 ′ 35 ′′ , and is 10.268732 . Also the logarithmic cosine of 95 ° 18 ' 24 " is 8.966080 , and the log . cot . of 126 ° 23 ′ 50 ′′ is 9.851619 . TO FIND THE ARC CORRESPONDING TO ANY ...
... equivalent to that of its supplement , or 61 ° 41 ′ 35 ′′ , and is 10.268732 . Also the logarithmic cosine of 95 ° 18 ' 24 " is 8.966080 , and the log . cot . of 126 ° 23 ′ 50 ′′ is 9.851619 . TO FIND THE ARC CORRESPONDING TO ANY ...
Página 51
... equivalent to an arc of one degree at the circumference . 2. The circumferences of circles vary directly as their radii : hence , in any circular arc struck with half that radius , or 2,865 feet , one hundred feet at the circumference ...
... equivalent to an arc of one degree at the circumference . 2. The circumferences of circles vary directly as their radii : hence , in any circular arc struck with half that radius , or 2,865 feet , one hundred feet at the circumference ...
Página 56
... equivalent to 20.67 degrees . Dividing by 3 , we have 6.89 chord lengths for the length of the curve . If the chords , as is usual , are each 100 feet long , the length of the curve in this case will be 689 feet . If the chord lengths ...
... equivalent to 20.67 degrees . Dividing by 3 , we have 6.89 chord lengths for the length of the curve . If the chords , as is usual , are each 100 feet long , the length of the curve in this case will be 689 feet . If the chord lengths ...
Página 64
... equivalent to 2067 minutes ; dividing by 620 , the number of minutes in the deflection angle , we have 3.33 , the number of chord lengths in the curve , = 33 chains : 220 feet . = If A be a stake numbered 2 , then the point of curvature ...
... equivalent to 2067 minutes ; dividing by 620 , the number of minutes in the deflection angle , we have 3.33 , the number of chord lengths in the curve , = 33 chains : 220 feet . = If A be a stake numbered 2 , then the point of curvature ...
Página 68
... equivalent to 4005 ' , and the degree of curvature 7 ° 30 ' is equivalent to 450 ' : dividing the former by the latter , we have 890 feet for the length of the curve , as before . 5. Adding 8.90 to 2.50 , the number of the P. C. , the ...
... equivalent to 4005 ' , and the degree of curvature 7 ° 30 ' is equivalent to 450 ' : dividing the former by the latter , we have 890 feet for the length of the curve , as before . 5. Adding 8.90 to 2.50 , the number of the P. C. , the ...
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