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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Resultados 1-5 de 42
Página ix
... quan- tity covered shall be taken , the numerator indicating the power and the denominator the root . B. M. Bench - mark : any fixed reference point for the level , ix as outcropping ledge , water - table of building ,
... quan- tity covered shall be taken , the numerator indicating the power and the denominator the root . B. M. Bench - mark : any fixed reference point for the level , ix as outcropping ledge , water - table of building ,
Página 3
... fixed number must be multiplied by itself in order to produce any given number . The fixed number is called the base of the system . In the common system , this base is 10 . It follows from the above , that the logarithm of any power of ...
... fixed number must be multiplied by itself in order to produce any given number . The fixed number is called the base of the system . In the common system , this base is 10 . It follows from the above , that the logarithm of any power of ...
Página 24
... fixed , and are therefore inaccessible . The adjustment , however , is one not liable to become deranged in either instrument , and , in the transit , is of comparatively small importance . 4. The young practitioner should bear in mind ...
... fixed , and are therefore inaccessible . The adjustment , however , is one not liable to become deranged in either instrument , and , in the transit , is of comparatively small importance . 4. The young practitioner should bear in mind ...
Página 30
... fix the point where any proposed formation slope must meet the surface on level ground , is quite simple ; the distance from the centre line being obviously made up of half the width of road - bed added to the horizontal distance due ...
... fix the point where any proposed formation slope must meet the surface on level ground , is quite simple ; the distance from the centre line being obviously made up of half the width of road - bed added to the horizontal distance due ...
Página 31
... fixed at 15.5 above grade , the next step is a guess how far out from the centre stake the formation slope would proba- bly meet the ground surface . The closeness of the guess will correspond to the experience and natural skill of the ...
... fixed at 15.5 above grade , the next step is a guess how far out from the centre stake the formation slope would proba- bly meet the ground surface . The closeness of the guess will correspond to the experience and natural skill of the ...
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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