24.816 1.07 55.440 1.65 87.120 4.50 237.600 87.648 4.60 242.880 88.176 4.70 248.160 49 25.344 1.08 1.09 57.552 .50 .52 57.024 1.68 88.704 4.80 .55 29.040 1.15 60.720 61.248 1.76 92.928 5.60 295.680 ⚫57 30.096 1.17 61.776 1.77 93-456 5.70 300.960 62.304 1.78 93.984 5.80 306.240 62.832 1.79 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. to find radius, length, degree, apex distance, chord, versed sine, 161 and external secant form for field notes . 52, 56 70 how to proceed when the P. C. is inaccessible 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, - 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 triangulate on to pass through a fixed point how to proceed when the P. C. C. is inaccessible 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 99 101 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 89 103 104 106 108 to two curves already located 109 to substitute a curve for a tangent connecting two curves 109 |