65 



The following diagrams explain more clearly the loss of 

 scale and lumber that comes in squaring round-edge lumber. 

 As has been said before, round-edge lumber is scaled on the 

 narrow face at the point of average width; on the other hand, 

 if the board is squared its width is limited by the dimension 

 at the small end or at some other narrow point. The two 

 diagrams show the effect of squaring two round-edge boards, 

 one with an excessive amount of taper and the other with 

 a bad crook. The dotted line R represents the scale of the 

 round-edge board, and the line S the scale of the square -edge 

 board. Although there is a considerable loss in scale, there 

 is even a larger loss in material. 



