REVIEWS 63 



planting was begun, in 1899, around 25 million plants were set out on 

 15,459 acres, the cost per acre varying between $6.10 and $34.58 per 

 acre, averaging $3.58 per thousand. Details of all operations are given 

 in tables. 



There is a singular absence of discussion of a broader, progressive 

 forest policy for the State, which may perhaps be explained by the 

 overshadowing presence of the specter of war stopping all thought of 

 economic development. Perhaps the recent appointment of Mr. Gifford 

 Pinchot to the commission, under which the department functions, 

 will help to adding the progressive element, especially as the Governor 

 IS said to favor more vigorous action. 3_ ^ p_ 



A Study of the Rots of Western White Pine. By J. R. Weir and 

 E. E. Hubert. U. S. Dept. Agr., Bui. 799 : 1-34. 1919. 



It is estimated that the stand of western white pine in British 

 Columbia, Oregon, Washington, Idaho, and Montana is about 23,685 

 million board measure, valued at about $102,875,000. The average 

 amount of rotten wood present is found to be about 7 per cent, accord- 

 ing to these studies, or 1,658 million feet, giving a loss of about 

 $7,201,250. 



These studies are based on the observation of about 1,400 trees 

 during logging operations on seven sale areas, mostly in the Coeur 

 d'Alene region of Idaho. 



Three fungi were found to be principally concerned; Trametes pini 

 producing rot in all parts of the tree, Polyponis schzveinitzii and Fomes 

 annosiis producing butt rot. 



Age was found to be a prominent factor in determining the amount 

 and stage of decay. The age of earliest infection was found to be 

 approximately 50 years. For all age classes the number of infected 

 trees and the amount of rot increased steadily with the age due to the 

 increase in dead branches, frost cracks and other opportunities for 

 infection. 



The bottom sites were found to be a little more favorable to the 

 development of rot than the slope sites. 



'J'he maximum production of sporophores is found to occiu" i'.i the 

 121 to 160 age class. The 10] to 120 age class presents, in so far as 

 the rot data shows, favorable figures upon which to determine a 

 pathological felling age. 



For control, projjer jjathological marking rules and practical methods 

 for the dis])(jsal of infected slash are recommended. K. F. 



