INDEX 



457 



Weights Continued 



molecular, 130 



relation to mass, 10 



source of power, 65 



table of, 12 



unit of, 8 

 Wheel and axle, 24, 38-41 



compared with pulley, 39 

 White lead process, 374 

 Wire, electric, 210 

 Wood, 



defects of, 412-416 (See also 

 "Lumber, defects of") 



uses in industry, 390 



varieties of, 393 

 Wood-planer, 433 

 Wood-working machines, 4*32-438 



boring machine, 435 



jointer, 433 



jointer guards, 437 



kinds of, 432 



molding machine, 435 



mortising machine, 435 



power saws, 432 



prevention of accidents, 435- 

 438 



sandpapering machine, 435 



saw-guards, 436 



shaper, 435 



tenon machine, 435 



turning lathe, 433 



wood-planer, 433 

 Work, 23 



measurement of, in heat units, 



339 



Working drawing, 229 

 Working edge, 417 

 Working face, 417 



