554 



INDEX 



Tongue truck, 338; for harrows, 

 218. 



Tool, defined, 186. 



Tool shop, 477. 



Topographical signs, 31. 



Towers, water, 493; windmill, 

 342. 



Township, division and num- 

 bering, 38; sections of, 39. 



Traces, proper angle of, 331. 



Tracks, hay, 272. 



Tractor, steam, 389. 



Transit, 54. 



Transmission of power, 320. 



Transportation, cost of, 142. 



Transport truck, 219. 



Trapezium, area of, 35. 



Trapezoid, area of, 35. 



Triangles, area of, 34; trans- 

 mission of power by, 324. 



Trucks, transport, 219. 



Turning point, 52. 



Ultimate strength of materials, 



404. 



Underdrainage, 59. 

 United States system of land 



survey, 38. 



Valve action in oil engines, 359. 

 Valves, for pumps, 489; safety, 



381. 

 Ventilation of farm buildings, 



531; influence of wind, 533; 



mechanical, 535; purposes of, 



31; temperature system, 534. 

 Ventilator, cloth curtain, 533. 

 Vertical boiler, 377. 



Wages, influence of farm ma- 

 chinery on, 182. 



Warm-air furnace, 526. 



Waste bank, 104. 



Water, capillary, 57; control of, 

 111; duty of, 56; hydrostatic, 

 57; measurement of, 134; reg- 

 ulation of soil water, 56; re- 

 quired for crops, 115; used in 

 irrigation, 117. 



Water level, 43; laying tile by, 

 89. 



Water pipe, 491; flow of water 

 in. 491; sizes, 491; systems, 

 492. 



Water supply, 480. 



Water wheels, 487. 



Weigher, 280. 



Weir, 134. 



Wells, 480. 



Whipping a rope, 541. 



Windmills, 339; construction, 

 341; development, 339; power 

 of, 341; regulation, 341; size 

 of, 340; towers, 342; types of, 

 340; utility of, 339, 486. 



Windows, "design of, 508; loca- 

 tion of, 507; size of, 508. 



Wing joist barn frame, 446. 



Wire rope transmission, 324. 



Wood, as a material for ma- 

 chines, 195. 



Work, defined, 186, 314. 

 Working stress, defined, 404. 

 Wrought iron, 197. 

 Wye level, 46. 



