Sa 
S) 
Great value of tropical forests. 
Very little known. 
4. General Economics of the Forest. 
Relation of forest to rainfall. 
(1) Forest dependent on rainfall. 
(2) Rainfall influenced by forest not so evident. 
(3) Cloud formation. 
Importance of the forest in the disposal of rainfall. 
(1) Flood period extended. | 
(2) Run off increased. 
(3) Injury lessened or prevented. ) 
(4) Serious results of floods in mountainous regions. 
Regeneration of forests. 
(1) Natural regeneration takes place, 
Ist, Through the seed. 
2nd, By growth of sprouts from the stump. 
(2) Shade endurers have the advantage in natural 
regeneration. 
Ex., hemlock spruce. 
Redwood regenerated by its abundant. coppice. 
Big-trees by seedlings. 
Broad leaved trees by abundant coppice. 
(3) Artificial regeneration of forests. 
Silviculture. 
Systems of management in cutting and rfe- 
generation of forests. 
Ist, Whe selection system. 
and, The system of clear cutting and re- 
generation by planting young 
trees or seed, or wind sowing. 
3rd, System of gradually thinning 
throughout. 
4th, Coppice system. 
(4) Protection of forests. 
By National and State governments for 
Ist, Protection of game and other wild 
animals. 
2nd, Protection of species from destrué- 
tion. 
37 
