132 THE WHOLE ART OF RUBBER-GROWING 



forests and jungles of Borneo, Malay States, and 

 Sumatra. The Dyaks find the tree standing 

 generally three to four to the acre. Each tree will 

 yield nearly 100 lb. of latex per year. About 70 per 

 cent, of this is serviceable jelutong, which in its 

 turn will yield probably 8 to 10 per cent, of 

 rubber. Formerly it was the custom to ship the 

 jelutong in a raw condition to the United States, 

 where the patents governing its manufacture were in 

 force ; but the waste was terrific, and in 1909 a power- 

 ful syndicate, embracing the Vanderbilts, the Goelets, 

 and others, was formed with an enormous capital to 

 secure not only the monopoly in jelutong, but also its 

 manufacture. Concessions were secured, and sub- 

 sequently a company was formed to exploit the 

 material on the spot. Goebilt — the name is derived 

 from an ingenious combination of the first and last 

 syllables in the names of the two chief millionaire 

 proprietors — Messrs. Goelet and Vanderbilt — an 

 ideal position at the entrance to the Kuchling River, 

 Sarawak, was fixed upon for the chief depot, 

 and here are now in active operation a large 

 and up-to-date plant capable of dealing with 

 100,000 lb. of jelutong per day. This is the 

 raw material of the industry, and is manipu- 

 lated under a secret process invented by M. Feval, 

 so as to produce a high-class finished rubber which 

 can be placed on the market at a cost not exceeding 

 is. 6d. per lb. 



The main features of the process are as follows : 

 The jelutong is first cleansed by a simple process, 

 and then treated with a resin solvent in specially de- 



