63 



TABLE No. 32. Comparison of Log Scales (Band Saw 

 versus Circular Saw). 



Round-edge versus Square-edge Lumber. 



Lumber operators generally recognize the fact that logs 

 sawed into square-edge boards do not yield as much lumber 

 as those sawed into round-edge lumber, but they are not often 

 aware of the precise difference, or why it comes about. We 

 obtained from Mr. Austin Gary a mill tally scale made at a 

 portable mill in Maine which was producing square-edge lum- 

 ber only, and we have printed that in parallel columns with 

 our Massachusetts rule representing the round-edge yield. 



