58 Forestry Quarterly. 



ing It also fell with constant heights but increasing diameters, 

 indicating that the more thrifty trees were relatively more conical. 

 This fall in the/ was approximately one point for every increase 

 of .8 inch in diameter. 



Form Quotient: The average form quotient (^j^) was 67.57. 

 The form quotient was found to be influenced in character and 

 amount in an almost entirely similar manner as the form factor. 

 This will be fully shown by a study of 



The Constant: The constant (<:), i.e. the difference between the 

 form factor and the form quotient, was found to be 21.87 on an 

 average of the 94 trees. Variations in height were without in- 

 fluence upon it as is shown by the following summary : 



Number 



Variations in diameter were also without appreciable effect. The 

 diameters and their constants are as follows : 



Number 

 of trees. 

 18 

 23 

 23 

 16 

 8 



The data are as follows : 



Number 



of trees. 



10 



43 

 9 



15 

 8 



The only consistent variation observed in the c was a gradual 

 rise with the rise of the form quotient and form factor, the former 

 rising slightly more rapidly than the latter, due, apparently, to a 

 relatively more sudden tapering off above the middle point in trees 

 which are more cylindrical in the lower half of the bole. This 

 variation is of practical importance in volume determinations 



