i88 



ing Rambong is to allow it to coagulate on the tree and then 

 pulled off in strings which are wound into balls. In Mr. Derrv's 

 Report for 1900, he mentions that he sent home 5^ lbs. of Ram- 

 bong Rubber prepared in this way which was quoted at 3/6 but 

 which actually sold for 3/10 per lb. and was stated to be of good 

 Java character. A small sample from Bukit Lintang which was sub- 

 mitted to a local expert was quoted as follows. u The sample of 

 " susu " duly reached me I "estimate it commercially as a good 

 l< but not quite the best quality of ordinary ,f Borneo Rubber " 

 " clean and well prepared value $145. to Si 60. per picul the pre- 

 sent value of No. 1 Borneo Rubber wet and dirty being 

 " $I25-$I29, and Gutta Grip Merah known commercially as Penang 

 " Rubber " No. I , about §1 70. 



This of course compares very unfavourably with the price ob- 

 tained for Rambong as quoted by Mr. DERRY, and it will be inter- 

 esting to find out whether the difference in price is caused by the 

 different method of preparation or that the quality of the rubber 

 yielded by the 19 year old trees tapped by Mr. Derrv, is so much 

 better. In a future number of the Bulletin the home Report will 

 be given on the samples sent and we shall then be in a better 

 position to judge the cause of the wide discrepancy in price. 



GUTTA JELUTONG. 



Gutta Jelutong is obtained from a large tree (Dyera costulata) 

 the wood of which is used for clogs, planks, and other purposes. 

 It is fairly common in many parts of the Malayan region. Some 

 few weeks ago a sample of this Gutta was received from the Senior 

 District Officer, Province Wellesley, and sent to the Director Royal 

 Gardens Kew who submitted it to the well known London Brokers 

 Messrs. Hecht Luis & Khan, who reported on it as follows. 

 u Gutta Jelutong is known on the market here as Pontianak and is 

 worth to-day about £ig. per ton. It generally arrives here in 

 large brick-shaped lumps and we have never seen it in the form 

 of your sample which also has not the peculiar smell that Pont 1 '- 

 anak has. We should estimate the value at about ^19-^20. per 

 ton." As will be seen from this, Jelutong is a low grade article of 

 no great value, but as the trees are often cut for conversion into 

 planks &c, the gutta as a secondary source of profit is at least 

 worth attention. The wood is white, soft, and extremely light, 

 specially adapted for drawing boards and postal boxes. It is 

 doubtful whether Gutta Pontianak is the product of Dyera costu- 

 lata only, it is more probably an admixture, as is the case with the 

 majority of the Guttas and rubbers of commerce. 



