u 



PARA RUBBER, 



Comparison of Yields at Peradeniya and Henaratgoda. 



The results which have been obtained from the full spiral system 

 at Peradeniya are not as satisfactory as those at Henaratgoda, and 

 are only briefly indicated here. At Peradeniya four trees, now nearly 

 30 years old, have been tapped from June, 1905, to February, 1906, 

 at irregular intervals. About three-quarters of the bark tissues have 

 been removed from the base to a height of five to six feet by alter- 

 nately pricking and paring the lower surface. Altogether each tree 

 has been tapped on 150 occasions during the time specified, and 

 the yield obtained is approximately 6| lb. of dry rubber per tree. 



At Henaratgoda 25 trees, from 15 to 20 years old, have been tapped 

 approximately twice per week from September 25, 1905, to Feb- 

 ruary, 1906. The pricker has been used alternately with the paring 



