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 ix
... power of the 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 ,
... power of the 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 x
... mark at the beginning of a curve . P. T. Point of tangent : the stake - mark at the end of a curve . P. C. C. Point of compound curvature : the stake - mark where a curve merges in another of different curvature , turn- ing in the same ...
... mark at the beginning of a curve . P. T. Point of tangent : the stake - mark at the end of a curve . P. C. C. Point of compound curvature : the stake - mark where a curve merges in another of different curvature , turn- ing in the same ...
Página 19
... mark the remaining sides as before . Then say , As the side made radius is to radius , So is the other given side to the name of that side ; Which determines the opposite angle . 5. Applying this method to the right- angled triangle ABC ...
... mark the remaining sides as before . Then say , As the side made radius is to radius , So is the other given side to the name of that side ; Which determines the opposite angle . 5. Applying this method to the right- angled triangle ABC ...
Página 23
... mark its proper place ; draw out the eye - piece until the cross - hairs are exactly in focus ; that is to say , until no movement of the eye shall appear to displace them , and bring the object to be observed clearly into view . 4 ...
... mark its proper place ; draw out the eye - piece until the cross - hairs are exactly in focus ; that is to say , until no movement of the eye shall appear to displace them , and bring the object to be observed clearly into view . 4 ...
Página 26
... mark . Wherever convenient the elevation of A above mean tide should be ascertained . It is to be regretted that this was not done from the outset , 2.64 1.9 0.81 2,22 2 8.4 3.7 3.2 3 10.36 under statute provisions requiring maps and ...
... mark . Wherever convenient the elevation of A above mean tide should be ascertained . It is to be regretted that this was not done from the outset , 2.64 1.9 0.81 2,22 2 8.4 3.7 3.2 3 10.36 under statute provisions requiring maps and ...
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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