PAGE Curves, miecellaneous - continued. trackmen's table of curves and spring of rails to project 143 39 Datum in levelling to find . . limit in field-practice to find on ground. table of tables of . ... Elevation of outer rail on curves table of of a 1o curve, Table XV. 269 150 Feet in decimals of a mile, Table VIII. . for transit for slope stakes rules for angles and distances switch-rails curved switch-rails curved patterns for . logarithmic, of arcs, to find 153 27 70 129 General propositions in trigonometry as to circles rise per mile, Table XVII. how to trace in field. 15 Level, to adjust . by barometer and thermometer correction for curvature and refraction rules for exact work suggestions concerning . admissible errors on ground of a Y. multiplication by Table XII. table of, XIII. Maps, contour, utility of notes for. not sufficient for intelligent projects . by equal shadows times of passage of North Star, Table I. 85 79 5 12 Natural sines, tangents, &c., defined Table XIV. to re-magnetize. bearings should always be noted times of meridian passage, Table I. 243, 256 41 Rails, table of spring for trackmen of a turnout curve for narrow gauges how to read. 143 129 317 7 . Senior assistant, duties of . equipment for for earth excavation. field record of work to facilitate tables of 80 130 . PAGE 269 108 109 50 57, 58, 61 29 115 132, 133 135, 136 139 142 144 143 144 145, 146 40 24 82 16 17 18 19 12 15 Vernier explained. on transit to calculate of a lo curve, Table XV. to project 42 12 39 TABLES: Ordinates of a 1o curve switch-rails curved 60 PAGE 150 151 151 152 152 153 153 155 161 179 197 243 256 269 315 317 curve. |