538 



THE INDEX 



construction of shallow, 363, 

 364; drilled, 361; for drainage, 

 2 99. 301; for irrigation, 262; 

 sanitary protection of, 361 ff.; 

 shallow, 360, 362 ff. ; source of 

 water for, 360; sources of pollu- 

 tion in, 361, 362; tubular, 361 



Whalen Diversion Dam (ill.), 263 



Wheel revolutions, 12; errors in 

 estimating by, 12 



Whiffletree, 479 



Whipping of rope, 36 f . 



Whipsawing, 107 



Whitewash, formulas for, 171 f., 

 321 



Willow, 229 



Wind, plant growth as affected 

 by, 81 



Windmill, 367, 370, 489 f. 



Window-frame construction (ill.), 



310 



Windows, 309 f., 328; glass for, 

 310; sash for, 309 



Wire: for fencing, 236 ff.; for 



telephone lines, 455; test for 



galvanized, 455 

 Wire gauge, 21 (ill.), 22; tabular 



comparison of different makes, 



22 f. 

 Wood 106-128 (see also Lumber 



Trees) ; for fence posts, 226 ff. 



for fences, 221; for fuel, 418 



grain of, 107; kinds used for 



lumber, 106, 123 ff. 

 Work, 462 



Worm, in fencing, 222 

 Worm holes, 112 



Yakima Project Diversion Dam 



(ill.), 265 

 Yard: length of, 7; square, 16; 



use, 7 



Zero point in measuring equip- 

 ment, 15 



