51 
annually exported— principally from Borneo and Suma- 
tra.! The bark is medium thick, soft, and very easy to 
excise, and new bark is formed much quicker than with any 
other rubber tree, and with ordinary skill and discretion 
there is not any reason why a single tree should be lost 
through over tapping. 
The latex is coagulated by natural heat and evapor- 
ation, pressed into balls and cakes and preserved with the 
addition of formalin. In this form it has the appearance 
of a white spongy cheese and a smell that is pungent. 
It is a huge mistake to suppose that these low grade 
rubbers are only used for cheap varnishes or pasting wail 
papers. I quote from Dr. Wermer Eschs’ notes on manu- 
factured india rubber at the recent exhibition. “ To-day 
Para rubber has had to be abandoned “as far as the manu- 
facture of considerable part of our India rubber goods is 
“concerned, and its place has been taken by cheaper rub- 
‘ ‘ bers. W e have had to learn to renounce to a great extent 
“the easy workable Para rubber, and to condescend to take 
“up the wearisome study of the methods of treatment of 
“ “(luayule” many have been unsuccessful herein on ao- 
“count of inability to fit themselves into the new con- 
ditions and surroundings.” 
This Dye ra (Jelutong) rubber is similarly used — so I 
was informed — in Germany, i.e. for compoundings and 
fillings as with low priced goods the best rubber are pro- 
hibitive and wi ill some other goods it is claimed that the 
article is improved by such addition or (qualified) adul- 
teration/ 
Owing to the poor grade and low price obtained for 
Jelutong rubber its cultivation would not attack private 
enterprise , but considering the demands ; the simplicity of 
conserving or fostering the present forest trees in the 
Peninsula ; the importance of this rubber is worthy of at- 
tention. 
In Malaya jelutong grows readily everywhere from 
naturally sown seeds. It may be profitable for reafforest- 
ing certain areas if seeds could be obtained. These are 
produced on old, tall,* trees and are difficult to collect as 
when the capsule bursts, the seeds which are flat and thin 
and apt to be blown away.i; 
J The Jelutong of Borneo is produced by D yera Lowian % . It is very 
doubtful whether this is distinct from the Malaya t'eninsula D. coslulata. 
* It will be understood that for compounding and fillings other ingredients 
than low grade rubbers are used. 
■' Another species grows in Fiji and is described as D. Piumosa and the 
rubber is stated to be of some value. 
% 
