64 



The reader will note that the difference in favor of the round- 

 edge sawing is from 10 to 15 per cent in the smaller logs, and 

 gradually diminishes until it reaches zero in the case of the 

 16-inch logs. This is as it should be in theory, because the 

 difference between the two methods of sawing is due to the 

 slab which must be removed to produce square-edge lumber, 

 and the proportion of slab to the yield in lumber becomes less 

 and less as the log increases in size. One will also note that 

 the 14-foot log shows a larger difference than the 12-foot log. 

 This is due to the fact that there is a greater taper and con- 

 sequently greater proportionate waste in slab in squaring the 

 longer logs. 



TABLE No. 33. Comparison of sawing Round and Square-edge 

 Lumber. 



