110 



DETERMINATION OF THE INCREMENT. 



Example : 



A Scotch pine wood has a height of 53 feet when 60 years 

 old, and a volume of 3,800 cubic feet ; find the probable incre- 

 ment for the next ten years ? 



YIELD TABLES. 



The wood belongs to the III. Quality. 

 According to the formula 



1*0-70= (4530-4060) x |? x^ = 457 cubic feet. 



