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 41
... base of some lofty point , as a church spire or chimney , on which point direct the cross - hair , and then , tilting the object end of the telescope downwards , set a pin , or make a pencil dot in line . Unclamp the spindle ; turn the ...
... base of some lofty point , as a church spire or chimney , on which point direct the cross - hair , and then , tilting the object end of the telescope downwards , set a pin , or make a pencil dot in line . Unclamp the spindle ; turn the ...
Página 74
... base CE of the triangle CDE = 180 ° — y = = 180 ° - 71 ° 48 ' = = 108 ° 12. By trigonometry , two sides and the included angle being known in any plane triangle , the sum of the known sides is to their difference as the tangent of the ...
... base CE of the triangle CDE = 180 ° — y = = 180 ° - 71 ° 48 ' = = 108 ° 12. By trigonometry , two sides and the included angle being known in any plane triangle , the sum of the known sides is to their difference as the tangent of the ...
Página 75
... base , is equal to the half sum of these angles decreased by their half difference , = 54 ° 06 ′ - 21 ° 45 ' 32 ° 21 ' . - - Set the transit , then , at C , foresight to D , deflect 32 ° 21 ' left , and fix in that range two points F ...
... base , is equal to the half sum of these angles decreased by their half difference , = 54 ° 06 ′ - 21 ° 45 ' 32 ° 21 ' . - - Set the transit , then , at C , foresight to D , deflect 32 ° 21 ' left , and fix in that range two points F ...
Página 85
... base , construct a contour map , with reference to which special observations Extreme accuracy in the contours need not be attempted . should be made in the field , and the chaining done with care . THE CURVE - PROTRACTOR . 85.
... base , construct a contour map , with reference to which special observations Extreme accuracy in the contours need not be attempted . should be made in the field , and the chaining done with care . THE CURVE - PROTRACTOR . 85.
Página 87
... base his preliminary estimates on a profile thus deduced from the map ; and he recommends the practice to others . They will be surprised to observe the likeness between such a profile , tolerably well done , and that of the subsequent ...
... base his preliminary estimates on a profile thus deduced from the map ; and he recommends the practice to others . They will be surprised to observe the likeness between such a profile , tolerably well done , and that of the subsequent ...
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