556 
Treated with aniline the C 10 H* 6 substance obtained was 
n% and the following was the result of the analysis : 
The C 10 H i6 substance obtained 0.8% resin 
1.8% ash 
Melting point 145° 
Treated with alcohol and ether we obtained of the 
C 10 H 16 substance by— 
— I Analysis 15% 
— II 12.23% 
The substance had of ash 0.28% analysis I 
Melting point 140° 
The total result of analysis I was 
Moisture 29.23% 
Resinous substance 54.12% 
C 10 H 16 substance 15% 
A further examination of the rubber-like substance was 
impossible on account of the small quantity at our disposal. 
The coagulation of the milk in this way seems to us to be 
a great improvement which will be of benefit for the selling 
price of Jelutong as the better keeping quality of the material 
will be favourably influenced by it, and besides, a saving in 
freight and packing will be possible.” 
(Sd). Harburg Vienna Rubber Works. 
Owing to the small sample submitted for analysis, it was 
not possible to say the percentage of rubber m the 15% 
hydrocarbon substance, otherwise the analysis, is exceptionally 
favourable for so low a grade rubber and also as compared with 
other analysis of commercial Jelutong. Jelutong rubber as 
received in America is stated to contain 50% of moisture, and 
Weber in his " Chemistry of India-Rubber ” places the resin 
as high, 85-95%. The purity, too, of our Purub prepared 
Jelutong should be of some value— as the difficulty of 
deresination is now better understood, and in America 
Jelutong resin is used for chewing-gum and in the manufac- 
ture of varnishes. 
R. DERRY. 
