Periodical Literature. 587 



table gives the prices paid per cubic foot for three representative 

 classes of logs during the pei'iod 1860-1912: 



AVERAGE PRICE PER CUBIC FOOT 



Bichenholzverkdufe im Spessart im Winter 1913-13. Forstwissenschaft- 

 liches Centralblatt, May, 1912. Pp. 284-286. 



A. D. Blascheck writes interestingly of 



True what he considers the requirements of the 



Selection selection system in British India. In order 



System. to determine the return in what he terms 



the "Periodic Selection System," he feels 



that the merits of felling cycles of different lengths should be 



governed by the following considerations : 



(i) The economical working of the annual coupe. 



(2) The average tree must be of a size which best suits the 

 objects of management and the tree of minimum size must not 

 involve a sacrifice through being felled at too early a date. 



(3) The cut must be heavy enough to insure regeneration 

 and recur often enough to prevent mature trees interfering with 

 the development of future stands. 



(4) The Felling Cycle should be a sub-multiple of the rota- 

 tion. T. S. W., Jr. 



The True Selection System, Indian Forester, September, 1913, pp. 427- 

 430. 



UTILIZATION, MARKET AND TECHNOLOGY. 



In an address before the New York section 



Wood of Chemical Industry, Dr. Teeple reviewed 



Waste what has been so far accomplished in the 



Utilisation. utilization of wood waste in a commercial 



way, the chief conclusion being that there 



are no mysterious possibilities in wood waste, warranting the 



expectation of wonderful profits. The constituents of wood 



