Acres, roods, and perches in square feet, Table VI. Adjustment and use of instruments Angles of frogs, to find. index, to find Cross-sectioning. See Slope stakes. Cubes and cube roots of numbers, Table XI. Curves, circular, on railroad defined to find radius, length, degree, apex distance, chord, versed sine, and external secant form for field notes Curves, how to lay out on the ground, with the chain only with transit and chain hints as to field-work protractor for slackening grade on terminal Curves, simple, location of, PAGE 161 51 how to proceed when the P. C. is inaccessible to shift the P. C. in order to strike a fixed tangent to change radius from same P. C. in order to strike a fixed tan- to compound a curve in order to strike a fixed tangent to shift a P. C. C. in order to strike a fixed tangent 99 101 to compound into a tangent intersecting main curve on concave 102 to compound into a tangent intersecting main curve on convex to shift a P. R. C. in order to strike a fixed tangent to connect curves of contrary flexure by short tangents to locate a Y from a tangent. 141, 142 52, 55 145, 146 to substitute a curve for a tangent connecting two curves 106 108 109 109 Decimals of an acre per 100 feet for various widths, Table V. Deflection angles and distances explained to find. short rule for sub-deflections limit in field-practice Degree of curve, to calculate. to find on ground. Deviations from project admissible on location Distances, tangential and deflection, defined table of of frogs from toe of switch tables of. Elevation of outer rail on curves table of Excavation and embankment, to stake out External secants, to find of a 1° curve, Table XVI Extreme elongations of North Star, Table II. Feet in decimals of a mile, Table VIII. Field-book, form of, for level for transit. for slope stakes Frogs and switches rules for angles and distances table of, switch-rails straight switch-rails curved plain rules for locating, switch-rails straight switch-rails curved on narrow gauges patterns for. Functions, trigonometrical, defined logarithmic, of arcs, to find General propositions in trigonometry as to circles. Grade, to slacken on curves rise per mile, Table XVII. Grade lines, how to project on map how to trace in field. Needle, magnetic, to adjust to re-magnetize. hints as to management bearings should always be noted North Star, to establish meridian by times of meridian passage, Table I. extreme elongations of, Table II. PAGE Obstacles in the field to vision to measurement Ordinates of circular curves, to find of parabola, to find of a 1 curve, Table X, Parabola, ordinates of Plane trigonometry Powers and roots of numbers by logarithms. Propositions, general, in trigonometry how to make Rails, table of spring for trackmen Radius of a curve, how to find.. of a turnout curve plain rule for, on curves for narrow gauges Radii and their logarithms, Table X. Records, forms for Refraction and curvature, correction for Reversed curves. See Curves. Rise per mile of various grades, Table XVII. Rod, levelling how to read. Rodman, duties of Roods and perches in decimals of an acre, Table IV. Roots and powers of numbers by logarithms Senior assistant, duties of equipment for Sines defined Shadows, to fix true north by Slope stakes, to set for earth excavation. for embankment for hillsides and rock field record of work Spring of rails, table for trackmen ̧. Squares, cubes, and roots of numbers, Table XI. Supplement of an angle Survey, form for record to facilitate Switch-rails, angles of tables of 71 73 . 58, 59 36 155 36, 59 12 7 15 84 85 143 52, 54, 56 129 133 134 155 81 28 317 28 42 83 151 7 80 81 12 44 315 84 30 31 33 35 34 143 161 12 81 82 130 135, 136 |
