REVIEWS 871 



logical literature. The list of species given as not occurring include 

 Pinus rigida, Cliamaecyphasis thyroides, Populus balsamifera, Hicoria 

 aquatica, Hicoria myristicseformis, Castanea pumila, Quercus ilicifolia, 

 Q. nigra, O. phellos. Planera aquatica, Ilex opaca, Acer pennsylvanicum, 

 Nyssa aquatica, Halesia diptera, and Fraxinus caroliniana. 



The bulletin contains valuable keys to families, genera, and species 

 of trees occurring in the State. Under each species is given a plate 

 showing leaves, twigs, and fruit, discussion of distinguishing botanical 

 characters, importance, and range of the tree in the United States and 

 Indiana, size and frequency of occurrence, distribution by counties in 

 the State, and the economic uses and horticultural value and in some 

 cases the best methods of planting. 



There is also an interesting table of measurements on largest trees 

 of some species occurring in the State. The author now has under 

 preparation a book on the trees of Indiana which he expects to com- 

 plete within about two years. 



W. D. S. 



The Reason for State Forests in the Canton Zug. By Ed. Sporri. 

 Schweizerische Zeitschrift fur Forstwesen. 3 and 4: 41-43. 1919. 



The attempted control of all business and factories by the State is 

 an extreme and one-sided viewpoint. Necessarily State control of some 

 industries and regulation of all must be continued, for the unity of the 

 State. The forests are obviously one of the resources which require 

 State control in order to keep the land productive and to stabilize labor 

 and the distribution of the products, since the industry is fundamental 

 to the State. All European governments are forest owners. In the 

 United States, government ownership is receiving a great deal of at- 

 tention, due to the destruction of the forests by private owners. By 

 government control the forest becomes a constant spring as a source of 

 products and industry. 



This is the necessity for State forests in this Canton. The State 

 forest of Ben, Schafif-hausen, Neuenburg, Friberg, and Waadt have 

 been the chief support of the industries. 



When the war began the Canton Zug did not have any State forests. 

 In 1915 and 1916 two purchases were made (Hinterwyden and Brand). 

 Other purchases were added during the next two years. Up to the 

 present 92 hectares (about 185 acres) have been purchased, of which 

 about 40 per cent is timbered. 



The largest forested area is in the Hinterwyden-Diessel. This is at 



