76 
illustrative photographs. The system used by these people is well 
enough known and need not be repeated. He confirms however 
again the statement that the Hevea brazHiensis , grows on the flooded 
banks of the Amazon. The driest months are July, August and 
September. The rains commence in October lasting with short 
breaks till February or March. The river commences to rise in 
October and is highest in June, when in many places it is 10 to 20 
inches above its ordinary level and it is in these flooded woods that 
Hevea braziliensis grows mixed with many other large trees includ- 
ing Cburoupita, Lecythis , Bombax, Cedrela , Hura crepitans and cho- 
colate. 
Of the other kinds of Hevea he mentions H. Spruceana , and a 
kind called Itauba which give a second quality of latex. H . nigra , 
H. paludosa ) H. orelha da one a, H. microphylla , Sarapo and H t 
pauciflora are hardly valued at all by the rubber collectors, or the 
latex is only used to mix with and adulterate that of H. braziliensis. 
The latex also of Sapium Taburu y is used to mix with Para rubber. 
■Micrandra siphonoides is another rubber plant from this district. 
A picture of its leaves, flowers, and fruits is given, and it is stated 
that the rubber from it resembles in structure, colour, and elasticity 
the Rambong rubber of Java and Sumatra and is valued at 
marks per kilogramme, with Para rubber at 9‘00 marks It grows 
with other rubber trees on the bio Negro, and might perhaps be 
worth some attention, but it has not so far as I know, been brought 
into cultivation as yet. 
A map of the Amazons region showing the distribution of the 
Para rubber along the main branches of the Amazons is given, which 
seems to show that it is exclusively confined to the river banks. 
RUBBER SEEDS FOR OIL AND OIL CAKE. 
Imperial Institute of the 
United Kingdom, the Colonies and India, 
Imperial Institute Road, London, S. W. 
20th January , 1905. 
Sir, — I have the honour to inform you that since the publication 
in the “ Bulletin of the Imperial Institute, ” (Vol. i„ 1903, p. 156) of 
the report on the utilisation of the seeds of the Para rubber tree, 
forwarded to you through the Colonial Office on the 21st November, 
1903, a considerable number of enquiries have been received here 
relative to the possibility of obtaining commercial supplies of the 
seed or oil. So far some difficulty has been experienced in obtain- 
ing these supplies, but now I understand a quantity of Ceylon seed 
is being placed on this market, though none has been sent from the 
Straits Settlements. 
