560 ^^^ Philippine Journal of Science 1914 



Plate IX 



Fig. 1. Interior of forest on Mount Maquiling, Laguna Province, Luzon. 

 The big trees are largely hidden by the small ones. (Photograph 

 by Brown.) 

 2. Second-growth forest in cutting area in northern Negros. The 

 trees are mostly Trema amboinensis. (Photograph by Martin.) 



Plate X 



Fig. 1. Logged area in Bataan Province, Luzon. (Photograph by Cortes.) 

 2. Homalanthus populneus forming second-growth forest in Bataan 

 Province, Luzon. (Photogi-aph by Cortes.) 



Plate XI 



Fig. 1. Schizostachyum invading area occupied by Homalanthus. (Photo- 

 graph by Cortes.) 

 2. Schizostachyum mucronatum (boho) in logged area in Bataan Prov- 

 ince, Luzon. (Photograph by Cortes.) 



PLATE XII 



Mature forest of Schizostachyum mucronatum (boho). (Photograph 

 by Whitford. Half-tone plate loaned by the Bureau of Forestry.) 



Plate XIII 



A forest of Bataan Province, Luzon, after being logged according 

 to the shelter- wood system. (Photograph by Mathews.) 



map 



Map 1. Distribution of forests in the Philippines. 



TEXT FIGURES 



Fig. 1. Ages of different diameters of Parashorea plicata growing in forest 

 and open country compared with yellow poplar from virgin forest 

 in Virginia and Tennessee, oak in planted forests in Europe, yellow 

 pine at an altitude of 2,650 meters in New Mexico, and white 

 oak from virgin forest in Kentucky and Tennessee. Figures for 

 Parashorea are from Mount Maquiling, Laguna Province, Luzon. 



2. Rates of growth of dipterocarps in virgin forest in northei'n Laguna 



Province, Luzon, compared with yellow poplar in virgin forests 

 in Tennessee and Virginia and white oak from virgin forests in 

 Tennessee and Kentucky. 



3. Rates of growth of dipterocarps in virgin forest, type area B, 



Bataan Province, Luzon, compared with yellow poplar from Vir- 

 ginia and Tennessee and white oak from Kentucky and Tennessee. 



4. Rates of growth of trees in cut-over forest. Type area A, Bataan 



Province, Luzon. 



5. Rates of growth of trees in badly over-cut forest along a trail in 



Bataan Province, Luzon, compared with yellow poplar from Vir- 

 ginia and Tennessee and white oak from Kentucky and Tennessee. 



6. A comparison of the rates of growth of dipterocarps in different 



regions and of yellow poplar and white oak. 



7. A comparison of the rates of growth of trees of different classes 



in virgin forest. Type area B, Bataan Province, Luzon. 



