Study of Current Growth 



455 



enabled the estimator to determine how many form classes were 

 necessary for that forest and fixed the typical form of each class 

 in the eye and mind of the caliper men so that they could properly 

 classify them, when calipering. The writer recognizes this classifi- 



cation as a makeshift, but believes that it is an improvement, and 

 a step toward tree classification for estimating by means of form 

 quotients. The method of computing from this point on, does not 

 differ in principle from that used by Mr. Stetson, although the 

 details vary slightly. 



