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 |
Dentro del libro
Resultados 1-5 de 27
Página ix
... Hence , or therefore . : Indicates the quotient of one divided by the other of the quantities it connects , called sometimes the ratio of the quan- tities . :: Indicates an equality of ratios , and connects equal ratios in a proportion ...
... Hence , or therefore . : Indicates the quotient of one divided by the other of the quantities it connects , called sometimes the ratio of the quan- tities . :: Indicates an equality of ratios , and connects equal ratios in a proportion ...
Página 4
... hence its logarithm lies be- tween 1 and 2 , as does the logarithm of 74 . 5. The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers . The logarithm of a quotient is equal the logarithm of the ...
... hence its logarithm lies be- tween 1 and 2 , as does the logarithm of 74 . 5. The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers . The logarithm of a quotient is equal the logarithm of the ...
Página 8
... hence .03 is the root required . 13. Five - figure logarithms are sufficiently accurate for ordi- nary railroad field - work . The tables in this book may there- fore , as a rule , be used without interpolation . PLANE TRIGONOMETRY ...
... hence .03 is the root required . 13. Five - figure logarithms are sufficiently accurate for ordi- nary railroad field - work . The tables in this book may there- fore , as a rule , be used without interpolation . PLANE TRIGONOMETRY ...
Página 13
... Hence , in figuring with these logarithms , as many tens must be subtracted from the final result as have been added in the operation . This rule is illustrated in the following examples . - TO FIND THE LOGARITHMIC FUNCTIONS OF AN ARC ...
... Hence , in figuring with these logarithms , as many tens must be subtracted from the final result as have been added in the operation . This rule is illustrated in the following examples . - TO FIND THE LOGARITHMIC FUNCTIONS OF AN ARC ...
Página 14
... Hence the required arc is 15 ° 19 ′ 51 ′′ . 7. By analogous process , the arc corresponding to log . cos . VI . GENERAL PROPOSITIONS . 1. In any right - 9.427485 will be found to be 74 ° 28 ′ 43 ′′ . 14 LOGARITHMIC SINES , ETC.
... Hence the required arc is 15 ° 19 ′ 51 ′′ . 7. By analogous process , the arc corresponding to log . cos . VI . GENERAL PROPOSITIONS . 1. In any right - 9.427485 will be found to be 74 ° 28 ′ 43 ′′ . 14 LOGARITHMIC SINES , ETC.
Otras ediciones - Ver todas
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