The Field Engineer: A Handy Book of Practice in the Survey, Location, and Track-work of Railroads; Containing a Large Collection of Rules and Tables, Original and Selected, Applicable to Both the Standard and the Narrow Gauge, and Prepared with Special Reference to the Wants of the Young EngineerD. Van Nostrand Company, 1890 - 339 páginas |
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Página 15
... vertical angle to the third side , or base . Also , as the sine of half the difference of the angles at the base is to the sine of half their sum , so is the difference of the sides about the vertical angle to the third side , or base ...
... vertical angle to the third side , or base . Also , as the sine of half the difference of the angles at the base is to the sine of half their sum , so is the difference of the sides about the vertical angle to the third side , or base ...
Página 18
... vertical angle , the original triangle is divided into two , each of which falls under the first case . Or they may be solved by the simpler methods applica- ble to right - angled triangles . Second Method . 7. Find any one of the ...
... vertical angle , the original triangle is divided into two , each of which falls under the first case . Or they may be solved by the simpler methods applica- ble to right - angled triangles . Second Method . 7. Find any one of the ...
Página 25
... vertical plane . 6. Next , the bubble being at the middle of its tube , carefully lift the telescope out of the wyes , turn it end for end , and replace it . If the bubble settles away from the middle , bring it half - way back by means ...
... vertical plane . 6. Next , the bubble being at the middle of its tube , carefully lift the telescope out of the wyes , turn it end for end , and replace it . If the bubble settles away from the middle , bring it half - way back by means ...
Página 26
... vertical in the wye bearings as hand and eye can make them , and by reference to a plumb - line , or the corner of a well - built house , see if the vertical hair is out of true . If so , slightly loosen two opposite screws of the ...
... vertical in the wye bearings as hand and eye can make them , and by reference to a plumb - line , or the corner of a well - built house , see if the vertical hair is out of true . If so , slightly loosen two opposite screws of the ...
Página 30
... vertical . Thus a slope of 45 ° is " 1 to 1. " A slope of " 2 to 1 " has a horizontal reach of two feet to each foot vertical . The carriages of a stairway with twelve - inch treads and eight - inch risers would have a slope of " 1 to 1 ...
... vertical . Thus a slope of 45 ° is " 1 to 1. " A slope of " 2 to 1 " has a horizontal reach of two feet to each foot vertical . The carriages of a stairway with twelve - inch treads and eight - inch risers would have a slope of " 1 to 1 ...
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Términos y frases comunes
A. D. MIN adjustment apex distance backsight called central angle CHORD column Cosine 1 Sine cross-hair Cube Roots decimal deflection distance degree of curvature degree of curve Diff divided engineer equal error Example feet figure fixed FOOD foregoing formation slope frog angle gauge of track gauge side ground Hence inches index angle instrument height intersection angle located logarithm Main frog dist mantissa mark measure method metres metric curve middle frog middle ordinate middle point minutes multiplied natural sine number corresponding observation opposite outer rail parallel perpendicular plane triangle Polaris quotient radii radius range REVERSED CURVE rule Sine 1 Cotang Square Roots sub-chord subtended Subtract Suppose switch-rail Table XVI tabular tance Tang tangential angle tangential distance telescope terminal tangent tion toe of switch transitman Trigonometry turnout curve vernier vertical ΙΟ