68 



ELEMENTARY WOODWORKING 



by human hands until it comes out as lumber of various 

 sizes ready to be loaded on boats or cars. 



Logs are sawed into timber, planks, or boards, and 

 these forms are called lumber. 



Timber refers to all of the largest sizes, such as beams 

 and joists. Planks are wide strips over one inch thick. 



Fig. 71. A Large Band Saw 



and boards are one inch or less in thickness, varying in 

 width and length. Lumber may be planed at a j)laning 

 mill, and is then known as dressed lumber. It may be 

 dressed on one, two, or all sides. Dressed stock which 

 is free from knots, shakes, and sapwood is called clear. 



