45 
Himalaya, Assam and bordering States to Upper Burmah, 
tlie Malay Peninsula and Sumatra. In habit there is well 
marked varietal types of this species ; 
(a) The Assam type has a straggling habit with 
pale green rather narrow leaves and the 
yield of latex is only moderate. 
(b) The Malayan type is of compact habit with 
larger green leaves (on young trees) and 
brilliant coloured stipules. The yield of 
latex is considerable, provided the period of 
recuperation is a lengthy one. 
(c) The Sumatra type resembles the Malayan 
plant but is a more ornamental form, "the 
leaves are deep shining green and more ellip- 
tic, and like its Malayan congener the yield 
of latex is large if not tapped too frequently. 
Formerly Rambong rubber appeared on the market in 
the form of scrap only — as the bulk of it does at the present 
time— but other forms of preparation are forthcoming and 
improving prices are being obtained. With old trees there 
is a short flow of latex, followed by a slower exudation 
which coagulates in tears and strips by natural heat on the 
incisions made on the tree . This if removed as soon as 
agglutinated may be boiled and prepared in the form of 
biscuit or sheet On younger trees, there is, comparatively 
a better how of latex and this can be treated with liquid 
ammonia, when the particles of caoutchouc, (after stirring) 
gradually separate into a thin layer and can then be skim- 
med, washed, rolled into biscuits, or passed through a 
crepe machine and dried. 
A 
A long period of rest is necessary owing to the thick 
latex peculiar to this tree and the more concentrated form 
in which the caoutchouc is obtained, despite this drawback 
,-, 1 m aVerag i e yle d per tree is probably higher than Para 
its ? nd c ° nSlderi ? gtbe lmmunit y of the tree to disease, 
filU? CU f Ure , , and h ? at cost of working, as well as the 
™L 8ra i d ® ° f i' ubber w i len weI1 Prepared, Rambong has 
manj claims for more extended cultivation in British 
y j y- y the exhibition the Netherlands’ section in- 
y d sheet8 > cakes— and m bulk —crude Rambong balls, or 
robed scrap pickings bound up with Rambong ribbons ob- 
Rnndmrio- S 1Cm ^ . scra P- In the Malayan section 
Rambong was exhibited m crepe form but only a few 
, T lle low P rioe of 3 / § a §ai“st 4/6 
foi fine haid Para is stated to be due to the small quantity 
T-l 
