25.344 1.08 57.024 1.68 1.09 .51 .52 ⚫53 25.872 89.232 88.176 4.70 248.160 253.440 4.90 258.720 1.70 89.760 5.00 264.000 1.71 90.288 5.10 91.344 5.30 279.840 60.192 92.400 5.5C 1.74 91.872 5.40 285.120 30.624 1.18 62.832 1.79 62.304 1.78 93.984 5.80 306.240 300.960 94.512 5.90 311.520 INDEX. Abbreviations explained Acres, roods, and perches in square feet, Table VI. Adjustment and use of instruments Angles of frogs, to find. PAGE ix 152 23 129 69 55 12 43 50 130 52 13 6 84 150 29 83 25 40 63 82 79 to find radius, length, degree, apex distance, chord, mid- Curves, simple, location of,- 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- how to proceed when the P. C. C. is inaccessible 127, 128 95 to compound a curve in order to strike a fixed tangent 98 to shift a P. C. C. in order to strike a fixed tangent 99 summary of rules for 101 to compound into a tangent intersecting main curve on concave 102 to compound into a tangent intersecting main curve on convex angles unequal, tangent points fixed, radii equal divergent tangents, radii equal, advancing towards intersection to shift a P. R. C. in order to strike a fixed tangent Curves, miscellaneous, - elevation of outer rail degree of, to find by calculation to find on ground to connect curves of contrary flexure by short tangents to substitute a curve for a tangent connecting two curves Curves, miscellaneous continued. trackmen's table of curves and spring of rails vertical curves, to calculate PAGE 143 to project 151 57, 64, Datum in levelling Decimals of an acre per 100 feet for various widths, Table IV. 82 patterns for. Functions, trigonometrical, defined logarithmic, of arcs, to find |
