Growth of Red Pine in Ontario. 



163 



average difference between the form quotients and form factors 

 is .216, or 21.6 per cent if we express it percentically — a constant 

 which comes very close to Judson Clark's difference of 21.87 

 per cent, for balsam fir (See Forest Quarterly, Volume I, p. 58) 

 and the constant of 21 per cent, for Norway spruce. 



Volume Tables. 



The height of the trees was so uniform that it was decided to 

 base the volume tables on diameters alone. The curve for total 

 volume in cubic feet was based upon the measurement of 115 

 selected trees, and for the volume of the wood inside the bark on 

 92 of them- The percentage of bark was figured out for these 

 92 trees and a curve was drawn to show the relation of bark 

 percentages to diameters. This curve was then compared with 

 those showing the total volumes of the stems and the volume of 

 wood inside the bark, and the necessary corrections resulted in 

 the following table : 



D 



