MILL TALLIES 



153 



form of manufacture. When boards in this form are sur- 

 veyed they are measured at the average width, inside bark, 

 on the narrow side, without discount for crooks. 



This practice has brought about great economy in the 

 use of timber, and when done with thin saws, has secured 

 from logs a far greater product than current scale rules 

 give. Several of the tables given herewith are of special in- 

 terest in this connection. In all these tables top diameter 

 means diameter of the upper end of the log inside bark. 



TABLE II 



Yield in inch boards of second growth white pine logs, 

 sawed with a circular saw cutting ^-inch kerf. Greater part 

 of boards not edged, but measured for width at an average 

 width, inside bark, on narrow side, without discount for 

 crook. 



Based on 1180 logs. From Massachusetts State Forester. 





As the edged lumber was taken from the larger and 

 straighter logs and after those logs had been sided on the 

 carriage and turned down, the yield was probably as large 

 as if all boards had been left round-edged. 



