368 Forestry Quarterly 



Tables are also given showing the percentage of species used 

 in the manufacture of different articles, together with the source 

 of supply and prices. 



The bulletin closes with a discussion of the possible uses of 

 native woods, and the usual list of commodities manufactured 

 from each kind of wood and a classified directory of manu- 

 facturers. 



J. H. W. 



Philippine Dipterocarp Forests. By W. H. Brown and D. M. 

 Matthews. Reprinted from the Philippine Journal of Science, 

 Vol. IX, Nos. 5 and 6, Sec. A, Chemical and Geological Sciences 

 and the Industries, September and November, 1914. Pp. 413-561. 



This publication is of particular interest to those who are inter- 

 ested in tropical forestry, and calls attention anew to certain 

 features that are contrary to ideas generally held on this subject. 

 These are, first, that tropical forests do not contain only heavy 

 hardwoods, but can be counted on for soft and medium hard con- 

 struction timber ; second, that the growth of tropical forests is not 

 extremely rapid; and third, that the reproduction of valuable 

 species is not as simple a problem as in many cases in temperate 

 regions. 



The article takes up a general description of Dipterocarp for- 

 ests for the whole Islands (growth, volume, plant associations, en- 

 vironmental considerations, effect of cultivation, planting and 

 general considerations of management), followed by the result of 

 detailed studies upon specially selected areas, in different parts of 

 the Archipelago. It contains many valuable tables and instructive 

 illustrations. 



The conclusions arrived at are very clearly set forth in the sum- 

 mary as follows : 



1. The dipterocarp forest is the most extensive and important 

 lowland forest of the Indo-Malayan region. 



2. In the Philippines it would naturally occupy all of the best 

 sites, but owing to the combined influence of man and climate it 

 has been removed from considerable areas. This is especially the 

 case in regions in which the dry season is pronounced. 



3. Due to the fact that the forest occurs in dense stands of a 

 few species which may be logged at a low cost, it is capable of 

 furnishing large amounts of construction and finishing lumber. 



