INDEX 



xvii 



Tangent deflection, 165 



deflection, Application of 



chord and, 166 

 distance, 162 

 distance of transition spiral, 



178 



Point of, 162 

 Telford's system of macadam 



roads, 398 

 Temperature, Corrections for, 



131 



stress, 286 

 Tensile stress, 275 

 Tension, Hoop, 281 

 Three-arm protractor, 127 

 -level ground, Field notes 



for, 205 



-level sections in earth- 

 work, 202 



-point problem in plane- 

 table survey, 110 

 Throw of a railroad switch, 



240 

 Ties per mile of track, Table 



of number of, 237 

 Timbers, Switch, 256 

 Time. 141 



To change local into stand- 

 ard, 143 



Toe of a railroad switch, 240 

 Topographic surveying, Sta- 

 dia method of, 116 

 surveying, 112 

 Track bolts in a keg, Number 



of, 237 

 Curved, 238 

 Trackwork, 234 

 Transit, Adjustments of, 44 

 Engineer's, 39 

 field work, 49 

 Laying out a curve with, 



163 



method of topographic sur- 

 veying, 112 

 of a star, 141 

 surveying, 39 

 surveying, Special problems 



in, 66 



Surveyor's, 39 

 vernier, 42 



Transition spiral, Definition 

 of, 172 



Transition spiral field work, 



179 

 spiral, Tangent distance of, 



178 

 spirals, Tables of, 180 to 



189 



Trapezium, 11 

 Trapezoid, 11 

 Trapezoidal rule for finding 



area, 12 



Traverse, Definition of, 51 

 Traversing, Methods of, 51 

 Triangle, 10 



Adjustment of measured 



angles of a, 137 

 Solution of, 20 



Triangles, Formulas for solu- 

 tion of oblique, 25 

 Formulas for solution of 



right, 24 



Trigonometric formulas, 20 

 functions, 18, 19 

 leveling, Problems in, 90 

 Trigonometry, 18 

 Troy weight, 3 

 True bearing, 38 

 Turning point in leveling? 



Definition of, 85 

 Turnout dimensions for point 



switches, 245 

 Switch in a, 240 

 Turnouts, 240 



from the outer side of 



curved track, 247 

 Table of dimensions of 



stub switch, 244 

 to the inner side of curved 



track, 248 



Two-point problem in plane- 

 table survey, 110 



U 



Ultimate resistance of chain 

 cables, Table of, 303 



strength, 279 



strength of flexure, 294 



strengths of metals, Table 

 of, 276 



strengths of woods, Table 



of, 278 

 Unit deformation, 275 



stress. 275 



