RELATION OF DIAMETER OF LOG 



41 



which case the volume of the log lying outside the cylinder is neglected. 

 On this basis, the apparent per cent of utilization would be con- 

 siderably increased over the figures given in the table.^ 



TABLE III 



Relation of Cubic and Board-foot Contents of 16-foot Logs with a Taper 

 OF 1 Inch in 8 Feet, Based on Tiemann's Log Rule, j^-inch Saw Kerf. 

 (§63) 



1 For a 16-foot log 12 inches at middle, with 2-inch taper, and scaling diameter 

 at end of 11 inches, the cubic contents are 10.56 cubic feet, the ratio of board feet 

 to cubic feet is 7.95, and the apparent per cent of utilization is 66| per cent as against 

 an actual 55.7 per cent when the entire volume including taper is taken as the basis. 

 For logs with considerable taper, which permits more lumber to be cut from the slabs 

 lying outside the cylinder, the apparent per cent of utilization would be still greater, 

 while the actual per cent utilized would in reality be lower for such rapidly tapering 

 logs than for more cylindrical forms. 



