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 27
Página viii
... have done by him , to the extent of his limited ability . Thus good turns go round , and we civilize by mutual service . HARRISBURG , PA . , March , 1890 . W. F. S. ABBREVIATIONS . + Increased by . Diminished by . × viii PREFACE .
... have done by him , to the extent of his limited ability . Thus good turns go round , and we civilize by mutual service . HARRISBURG , PA . , March , 1890 . W. F. S. ABBREVIATIONS . + Increased by . Diminished by . × viii PREFACE .
Página x
... turn- ing in the same direction . P. R. C. Point of reverse curvature : the stake - mark where a curve merges in another turning in the opposite direction . B. S. Backsight , in transit work ; or the reading of the rod to ascertain the ...
... turn- ing in the same direction . P. R. C. Point of reverse curvature : the stake - mark where a curve merges in another turning in the opposite direction . B. S. Backsight , in transit work ; or the reading of the rod to ascertain the ...
Página 25
... Turn the tele- scope slightly on its bearings , so that the bubble - case shall project a little on one side or the other . If the bubble slips , correct half its movement by means of the small lateral capstan head screws at one end of ...
... Turn the tele- scope slightly on its bearings , so that the bubble - case shall project a little on one side or the other . If the bubble slips , correct half its movement by means of the small lateral capstan head screws at one end of ...
Página 26
... turning it . Try again the adjustment of the line of collimation before pinning up the wyes . XI . LEVELLING . 1. Suppose O the starting - point ; 1 , 2 , 3 , & c . , the stakes of survey ; and A the initial bench - mark . Wherever ...
... turning it . Try again the adjustment of the line of collimation before pinning up the wyes . XI . LEVELLING . 1. Suppose O the starting - point ; 1 , 2 , 3 , & c . , the stakes of survey ; and A the initial bench - mark . Wherever ...
Página 27
... turn at sta . 2 , drive a pin nearly to the ground at that stake ; sup- pose the rod on it to read 0.81 . The ... turning - points should be read to thousandths , and the reading ing the target fast , it should be swayed slowly checked ...
... turn at sta . 2 , drive a pin nearly to the ground at that stake ; sup- pose the rod on it to read 0.81 . The ... turning - points should be read to thousandths , and the reading ing the target fast , it should be swayed slowly checked ...
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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