PARA RUBBER. 



80 



inches or over. The trees were tapped on the full herring-bone 

 system, each tree being tapped every alternate day. The paring 

 operations were done carefully, the width of excised bark being 

 slightly less than one inch per month. The total quantity of rubber 

 from the 5,598 trees, some of which were tapped from January on- 

 wards, others only from October, was 7,592 lb. or 1-34 lb. per tree. 

 It is interesting to know that the total cost per lb. for collecting, 

 including knives, tins, &c, was 53-46 cents and for curing 6- 25 cents 

 per pound of rubber. I have to thank Mr. G. H. Golledge for his 

 kindness in favouring me with the results of his work during 1905. 

 Yields on Imboolpitiya Estate, Nawalaimtiya, Ceylon. 



An interesting series of yields, for which I am indebted to Mr. 

 Albert Rosling, have been obtained on the above estate, situated 

 in the Ambagamuwa District, at an elevation of 2,000 feet, where 

 the rainfall average for 20 years is 144$ inches per year. 



The tapping operations were commenced on 18th December, 1905, 

 and terminated on 18th March, 1906, so that the collection of the 

 latex was carried out during three very dry months and through the 

 period when the trees changed their foliage. The following are the 

 yields obtained, inclusive of scrap : — 



The two trees, 28 years old, gave during September and October, 

 1905, 12,000 seeds ; the other tree of the same age seldom yields 

 more than 400 to 500 seeds annually. 



Comparison of Yields from Ceylon Properties. 



Having indicated the yields obtained in various parts of the world 

 and those from estates and exceptional trees in Ceylon, the following- 

 synopsis is given to assist those who desire to form an estimate of 

 probable future yields: — 



Name of Rubber 

 Property. 



Neboda Tea Co. of 

 Ceylon, Ltd.. Ceylon. 

 t 



Yield of 

 Rubber ob- 

 tained in 

 1905. 



lb. 

 820 



Number 

 of Trees 

 tapped. 



370 



Average 



Yield per 



tree per 



year. 



lb. 

 2i 



Particulars 

 of Trees 

 tapped. 



Young, and 

 attained tap- 

 ping stage in 

 1905. 



{Continued over. 



( 12) 



