151 50 57, 64, 68 Decimals of an acre per 100 feet for various widths, Table V. rules for exact work rules for survey and location suggestions concerning. Location, problems in, field admissible errors on ground form of record for projects, hints concerning of terminal curves multiplication by division by of numbers, to find Table XII. roots and powers by Logarithmic sines, tangents, &c., to find Maps, contour, utility of notes for not sufficient for intelligent projects 26 29 28 27 27 28 83 94 81 81 84 88 103, 104, 106 3 5 6 4 179 7 13 197 85 82, 83 79 plain rules for laying off turnouts with tape-measure and pins elevation of outer rail instructions how to put in missing stakes on curves with tape- 42 43 12 . 54, 58 269 36 39 60 88 89 135 136 142 143 149 PAGE III. Azimuths of North Star, and their natural tangents 150 IV. Roods and perches in decimal parts of an acre 151 V. Decimals of an acre in one chain length of 100 feet, and of X. Radii and their logarithms, middle ordinates, and deflection 155 XI. Squares, cubes, roots, and reciprocals of numbers, from 1 to 161 XII. Logarithms of numbers from 1 to 10,000 179 XIII. Logarithmic sines, cosines, tangents, and cotangents 197 XIV. Natural sines and cosines . 243 Natural tangents and cotangents 256 XV. Chords, versed sines, external secants, and tangents of a l' |