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 10
... sides and three angles . When three of these parts are given , one being a side , the remaining parts may be found by computation . The operation of finding the unknown parts is called the solu- tion of the triangle . 10 2. A plane ...
... sides and three angles . When three of these parts are given , one being a side , the remaining parts may be found by computation . The operation of finding the unknown parts is called the solu- tion of the triangle . 10 2. A plane ...
Página 11
... sides ; the centre of the circle being at the vertex , and its radius being 1. The circle , for convenience , is divided into 360 equal parts called degrees ; 90 of these parts are included in a quadrant , which includes one - quarter ...
... sides ; the centre of the circle being at the vertex , and its radius being 1. The circle , for convenience , is divided into 360 equal parts called degrees ; 90 of these parts are included in a quadrant , which includes one - quarter ...
Página 15
... sides about the 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 ...
... sides about the 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 ...
Página 16
... side . 4. If an angle be required , say , - As one of the given sides is to the sine of its opposite angle , So is the other given side to the sine of its opposite angle . The third angle becomes known by taking the sum of the two ...
... side . 4. If an angle be required , say , - As one of the given sides is to the sine of its opposite angle , So is the other given side to the sine of its opposite angle . The third angle becomes known by taking the sum of the two ...
Página 17
... sides a and b , as above , and angle A ; to find angle B. As side a Is to sin . A So is side b • · • To sin . B = 36 ° 43 ′ · • · ( a . c . ) log . 8.021364 log . 9.616616 log . 2.138618 log . 9.776598 sum . CASE II . 5. When two sides ...
... sides a and b , as above , and angle A ; to find angle B. As side a Is to sin . A So is side b • · • To sin . B = 36 ° 43 ′ · • · ( a . c . ) log . 8.021364 log . 9.616616 log . 2.138618 log . 9.776598 sum . CASE II . 5. When two sides ...
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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