156 THE RUBBER INDUSTRY 



O-i o'-O 40' o- o - O 



J J J J 



o o o o 



T T 77 



O-io'-O O-i o'-O 



O-10-O O-10*- 



J J *i ^1 



o o o o 



O-io'-O 40' O-io-O 



FIG. i. PLAN OF PLANTATION 



At spacings of 10 feet by 40 feet as shown, an acre would carry 

 sixty-nine trees. 



