Periodical Literature. 627 



For the maintenance of favorable soil conditions the selection 

 forest has many advantages and no disadvantage. 



Size of property is a requisite for a compartment system of 

 silviculture, while the selection forest is adapted to any size of 

 property; the soil is not only protected but is improved and, as 

 the author claims, made ready for natural regeneration. The 

 selection forest is the treatment most independent of a neigh- 

 bor's doing, and increases the interest of the owner by requiring 

 him to select and pay attention to the young growth, while a 

 compartment system is apt to lead to neglect of the felling area. 



In furnishing the requirements of the farm and occupation in 

 winter for men and animals the selection forest furnishes the 

 best opportunity and permits to satisfy the variety of wants for 

 different kinds and sizes. 



The author thinks that the selection forest, because of the dis- 

 tribution of sizes and kinds provokes less to speculation than the 

 concentrated even-aged forest, and less to overcutting because 

 the speculator cannot as readily determine quantities, as in the 

 simple compartment. Hence in Switzerland the worst condi- 

 tions of private forest is found where a clearing system has been 

 introduced, and the best in the selection forest. 



The author agrees that to carry on a rational selection system 

 more knowledge and skill is required than in simpler clearing 

 systems, but does not place much weight on this objection. There- 

 fore, gross mistakes will be rarely made. 



The protective value of the selection forest is then accentuated, 

 which in the mountainous country of Switzerland is of great im- 

 portance. 



Privatwald und Plcnterbctrieb. Schweizerische Zeitschrift fiir Forst- 

 wesen. September, October, 191 1. Pp. 247-255. 



The literature on this dangerous enemy of 

 Combating the spruce and pine is still growing. A 



the long article on the polyeder disease of the 



Nun. Nun (Lymantria monacha L.) by Dr. 



Wahl runs through various numbers of the 

 Centralblatt f. d. g. Forstwesen ; an article by Klock also en- 

 larges from the practical side on the use of this disease, in the 

 Forstwissenschaftliche Centralblatt. 



Dr. Sedlaszek reports on experiments through four years in 



