Forest Mensuration 



rules. They are converted into cubic feet (columns d, g, and j) by divid- 

 ing by 12. The loss incurred in sawing is shown by percentages (col- 

 umns e, h, k) representing the ratio between the actual cubic con- 

 tents of a log (as given in column b), and the cubic contents of inch 

 boards (columns d, g, j) obtained from such log. 



It will be observed that the loss in the actual yield according to Schenck 

 forms a nearly constant proportion of the cubic contents of a log in the 

 case of all diameters, whilst, according to Doyle's and Favorite rules, the 

 figures of loss vary greatly. 



The table refers to logs 12' long sawed into i-inch boards. 



From column e it is evident that the bandsaw wastes close to 1/3 

 of the cubic contents of a cylindrical log, or 4' b. m. out of every cubic 

 foot. 



Consequently, from hardwood logs 12 feet to 16 feet long, the band- 



