;94 



JOURNAI, OF FORESTRY 



With black oak are grouped the closely related species such as red oak, 

 Texan oak, and Spanish oak. 



Diameter growth was studied by finding the relation between the 

 radial growth during a given decade and the radius at the beginning of 

 that decade. The first four tables show the diameter growth at breast 

 height of each of the four species studied. The curves on which these 

 tables are based are also given. The next four tables show the relation 

 of age, height and volume to diameter at breast height for each of the 

 lour species. 



The reviewer took one of these last tables — that for black oak — and 

 prepared the following figures on current annual increment by Press- 

 ler's and Schneider's formulae.^ 



It would seem that similar figures for the c. a. i. of the other species 

 would increase the utility of this study. 



The bulletin ends with a tally of the trees and of the volume yield 

 on four sample plots as a test of the accuracy of the computed volume 

 tables. The average error was found to be 3 per cent. A. B. R. 



^ See Recknagel, A. B., and Bentley, J.. Jr., "Forest Management,' 

 & Sons, N. Y., 1919. Articles 68 and 69, pp. 110-111. 



John Wiky 



