THE INDEX 



537 



Tractive force. See Draft 



Tractive resistance, 198 



Tractor, 483 ff . ; " caterpillar, ' ' 

 484 f . ; kinds of work per- 

 formed by, 484 fT. 



Transmission of power. See 

 Power, transmission of 



Transmitters for telephones, 442 f . 



Trap for barn use (ill.), 382 



Trees (see also Lumber; Wood): 

 broad-leaved, 106, 124 f.; coni- 

 fers, 106, 123 f.; growth, 106 f.; 

 hardwood, 106, 124 ff.; injury 

 done by roots of, to tile drains, 

 298; kinds used for lumber, 

 106, 123 ff.; purposes for which 

 various kinds are suited, 126; 

 soft wood, 106, 123 f.; use of 

 dynamite for planting, 192; 

 water requirements of, 250 



Trenching, 285 ff . ; backfilling of 

 trenches, 294; grading for, 

 288 ff. ; hand-trenching imple- 

 ments, 285 ff.; machines for, 

 287 f. 



Triangle, formula for area of, 17 



Trowel finish for concrete, 152, 



153 (ill-) 

 True line, 83 

 Truss, details of construction of 



(ill;), 306 

 Turbine wheel, 491 f. 

 Turpentine as solvent for paint, 



168 



Und<°rdrainage, 281 f., 385 

 United States Land Office, 9, 10, 



83, 85, 86, 88, 101, 103, 104 

 Untwisting of rope, preventing, 



36 ff. 



Vacuum system of heating, 416 

 Valves: flywheel markings for gas 

 engines, 516; for gas engines, 

 514; for sinks (ill.), 374; globe 

 and gate (ill.), 381; types and 

 adjustment for gas engines, 



515 

 Vapor system of heating, 416 

 Vara, 10 

 Varnish: oil, 171; spirit, or 



shellac, 171 

 Varnishing, 318 f. 

 Veneer, 118 



Ventilation: for barns, 336 ff.; 

 for houses, 416 f . ; power sys- 

 tems of, 417 



Vineland, N. J., rainfall statistics 

 for, 251 



Viscosity, 465 



Voids, 130; to secure small per- 

 centage in concrete, 133, 135 



Volt, 430 



Walls: brick, 308 f.; for base- 

 ments, 305; for foundations, 

 304; frame, 305; galvanized, 

 306 f . ; stucco, 305 f . ; tin, 307 f . 



Walnut, 106, 126 



Wane, 118 



Washroom, 333 



Waste, disposal of, 385 ff. 



Watch method of determining 

 direction, 24 



Water {see also Irrigation) : appli- 

 cation of, for irrigation, 265 f . ; 

 conveyors of, for irrigation, 

 258 f.; daily consumption of, 

 by various animals and for 

 household use, 367; disposal 

 of (see Drainage; Irrigation); 

 duty of, 262; effect of high 

 water on tile drainage (ill.), 

 295; for gas-engine cooling, 

 519; for power purposes, 490 ff . ; 

 ground, 360; importance of, to 

 crop production, 248 f . ; meas- 

 urement of flowing, 2 1 ; mobil- 

 ity of, 402 ; protection of drink- 

 ing, 384; riparian rights, 95, 

 105; sources of, for irrigation, 

 262; surface, 360 



Water-logging, cause of, 81 



Water supply, 360-383 



Water systems (see also Piping): 

 fittings for, 374 f . ; fixtures for 

 house, 375 ff. 



Watt, 430 f . 



Wax for finishing, 171 



Weather. See Climate; Rainfall; 

 Temperature 



Weather reports, importance of 

 considering, in purchasing land, 



73, 74 

 Well-pipe hitches, 48 f . 

 Wells: artesian, 361; bored, 361; 



construction of shallow, 363 ff. ; 



deep, 365 f . ; diagrams showing 



