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 11
... function of a quantity is something which depends upon that quantity for its value . The sine of an angle is the distance from one extremity of the arc enclosing it , to the diameter , through the other extrem- ity . Thus PM is the sine ...
... function of a quantity is something which depends upon that quantity for its value . The sine of an angle is the distance from one extremity of the arc enclosing it , to the diameter , through the other extrem- ity . Thus PM is the sine ...
Página 12
... functions . V. LOGARITHMIC SINES , ETC. 1. Logarithmic functions are the logarithms of the natural functions treated in foregoing Art . IV . , the characteristics throughout being transformed by the algebraic addition of 10 , which has ...
... functions . V. LOGARITHMIC SINES , ETC. 1. Logarithmic functions are the logarithms of the natural functions treated in foregoing Art . IV . , the characteristics throughout being transformed by the algebraic addition of 10 , which has ...
Página 13
... FUNCTIONS OF AN ARC WHICH IS EXPRESSED IN DEGREES AND MINUTES . 2. If the arc is less than 45 ° , look for the degrees at the top of the page , and for the minutes in the left - hand column ; then follow the corresponding horizontal ...
... FUNCTIONS OF AN ARC WHICH IS EXPRESSED IN DEGREES AND MINUTES . 2. If the arc is less than 45 ° , look for the degrees at the top of the page , and for the minutes in the left - hand column ; then follow the corresponding horizontal ...
Página 14
... function of its supplement . Thus the logarithmic tangent of 118 ° 18 ' 25 " , is equivalent to that of its supplement , or 61 ° 41 ′ 35 ′′ , and is 10.268732 . Also the logarithmic cosine of 95 ° 18 ′ 24 ′′ is 8.966078 , and the log ...
... function of its supplement . Thus the logarithmic tangent of 118 ° 18 ' 25 " , is equivalent to that of its supplement , or 61 ° 41 ′ 35 ′′ , and is 10.268732 . Also the logarithmic cosine of 95 ° 18 ′ 24 ′′ is 8.966078 , and the log ...
Página 19
... functions are as follows : sin.2 + cos.2 = 1 ; tang . : - 1 sin . COS . = ; cotang . = = COS . sin . tang . 1 1 sec . = ; cosec . = cos . sin . versine 1 cos .; co - versine = 1— sin . ADJUSTMENT AND USE OF INSTRUMENTS . IX.-XV ...
... functions are as follows : sin.2 + cos.2 = 1 ; tang . : - 1 sin . COS . = ; cotang . = = COS . sin . tang . 1 1 sec . = ; cosec . = cos . sin . versine 1 cos .; co - versine = 1— sin . ADJUSTMENT AND USE OF INSTRUMENTS . IX.-XV ...
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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