246 Forestry Qnurterly. 



Several pages are then devoted to the two types of mistletoes 

 found in California, Phoradendron and Rasoumofskya, v^hich 

 latter are the common causes of witches' brooms on coniferous 

 trees. 



The manual concludes with a discussion of the practical 

 methods of controlling tree diseases. Two general rules for con- 

 trol are laid down : 



First — Save the merchantable timber of a tree as long as the 

 amount to be saved justifies it. This simply means closer utili- 

 zation of our timber supply. Second — Prevent the infection and 

 infestation of sound timber by getting rid of all diseased and in- 

 sect infested living or dying trees. This means sanitation of our 

 forests. 



"Systematic elimination of the common fungi or mistletoes will 

 take many years. The method which gives the best results is 

 illustrated by a stipulation inserted in the Forest Service timber 

 sale contracts. This requires the purchaser to cut all trees marked 

 apon the cutting area, whether merchantable or apparently un- 

 merchantable. Trees must be opened up sufficiently to satisfy the 

 Forest officer in charge of their condition, and any logs in such 

 trees which, in his judgment, are merchantable, must be removed 

 from the woods, scaled and paid for. This enables the Forest 

 Service to get rid of all undesirable stuff and to leave only sound 

 seed trees and sound reproduction in healthy surroundings. It 

 also makes possible utilization of merchantable timber left in un- 

 desirable trees, which would otherwise go to waste." L. M. 



Forest Management of Loblolly Pine in Delazvare, Maryland 

 and Virginia. By W. D. Sterrett. Bulletin 11, Department of 

 Agriculture. Contribution from the Forest Service. Washington, 

 D. C. 1914. Pp. 59. 



This bulletin covers the subject of the management of this 

 species in a comprehensive manner, and it is presumed repre- 

 sents the results of a large amount of data collected during past 

 years by the Forest Service in the states mentioned. The tables 

 are especially valuable, those on costs and net profits should be 

 helpful to private owners, and those on growth and volume to 

 the professional forester. 



