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
... minutes , and each minute into 60 equal parts called seconds . Degrees , minutes , and seconds are de- noted by the symbols ,, : thus the ex- pression 7 ° 22 ′ 33 ′′ is read , 7 degrees , 22 minutes , and 33 sec- onds . 3. The ...
... minutes , and each minute into 60 equal parts called seconds . Degrees , minutes , and seconds are de- noted by the symbols ,, : thus the ex- pression 7 ° 22 ′ 33 ′′ is read , 7 degrees , 22 minutes , and 33 sec- onds . 3. The ...
Página 13
... 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 line till you come to the column designated at the top by ...
... 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 line till you come to the column designated at the top by ...
Página 14
... minutes from the left or right hand column , as the case may be . If the given logarithm is not found in the table , find the next less logarithm , take from the table the corresponding degrees and minutes , and set them aside ...
... minutes from the left or right hand column , as the case may be . If the given logarithm is not found in the table , find the next less logarithm , take from the table the corresponding degrees and minutes , and set them aside ...
Página 43
... minute short . The vernier , therefore , is scaled to read minutes ; and , if its zero mark be moved slowly half a degree on the limb , its several subdivision marks , one after an- other in arithmetical succession , will be seen to ...
... minute short . The vernier , therefore , is scaled to read minutes ; and , if its zero mark be moved slowly half a degree on the limb , its several subdivision marks , one after an- other in arithmetical succession , will be seen to ...
Página 44
... minute mark on the vernier to the angle already ascertained within half a degree from the limb : the sum will be the angle sought . The vernier in the figure reads 1 ° 20 ′ L. 5. In some respects a vernier graduated decimally would be ...
... minute mark on the vernier to the angle already ascertained within half a degree from the limb : the sum will be the angle sought . The vernier in the figure reads 1 ° 20 ′ L. 5. In some respects a vernier graduated decimally would be ...
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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