REVIEWS 235 



Table 6. — Height Growth of Nonvay Spruce 



Average height 

 Age of stand 



Years Feet 



5 2 



10 7 



15 15 



20 27 



etc. etc. 



Table 13. — Diameter Growth of Norway Spruce 



Average diameter 

 Age breasthigh of 



stand 

 Years Indies 



5 0.0 



10 0.3 



15 1-5 



20 3 7 



25 6.0 



30 7-2 



35 8.2 



etc. etc. 



Under the caption "Volume Growth," the author speaks of the fact 

 that "spruce does not respond immediately to an opening up of the 

 crown cover." He neglects to give any definite figures, such as those 

 in the article by Bentley on ''Accelerated Growth of Spruce after Cut- 

 ting in the Adirondacks," in the November number of the Journal. 

 In fact, the author has apparently made little effort to secure recent 

 data from any but the most obvious sources. The latest figures he 

 quotes bear date of 19 12. It would be a sad commentary on the unpro- 

 ductiveness of Eastern foresters if nothing worth while had been 

 learned about spruce since that time. It is to be regretted that the 

 bulletin does not contain much valuable information about the produc- 

 tion of red spruce, which would have been easily available. 



The table on page 39 (unnumbered) is an echo of the old Bureau of 

 Forestry Working Plans. This method of determining the volume 

 growth is simple and satisfactory, provided that stress be laid on the 

 need of discounting for mortality and for unthrifty trees. (3f greater 

 value are the tables (15 and 16) showing cubic volume growth of red 

 s])ruce in the Adirondacks and West Virginia respectively. A com- 

 parison of the growth in these two regions shows tiieni not to be so 

 dissimilar as we might suppose. Thus : 



Periodic 



Years D. b. h. annual growth M. a. i. 



Inches Cubic feet Cubic feet 



.A.clironclacks 70 10 .7 .214 



West Virginia 70 10.5 .83 .271 



Adirondacks 80 12.0 .8 .288 



West Virginia 80 12.5 i.i .375 



