48 
Note on the above. 
Of unhusked fresh seed large and small mixed, ioo weighed a 
pound. When the husk was removed the kernels weighed \ oh ounces, 
so that it would require 3 4 1,308 seeds to make a ton. 1 Ins would he 
produced by about five acres of rubber trees in full bearing. A man 
could gather say 50,000 a day, and including expenses, there might 
to be a profit of 15 dollars an acre on the seed. As there are facili- 
ties in Singapore for preparing the oil and cake, it would save a 
good deal of expense in freight and charges to manufacture the oil 
here, and this would also save deterioration by drying. 
Editor. 
rambong rubber. 
Professor WyNOHAM R. DuNSTAN, writes from the Imp.-ri il In- 
stitute as follows on a sample of Rambong rubber an 1 an accom- 
panying letter : — “ With reference to your query regarding the Ficus 
rubber, its lower price compared with Para is chiefly due to the much 
larger percentage of resin which it usually contains and also to the 
fact that the physical characters of the rubber itself are not quite so 
good. Improvements might be effected in both these directions by 
better methods of collection and preparation, and it will be well to 
continue experiments with these objects in view. 'I he amount of 
resin present in the rubber may depend to some extent on the age 
of the trees diminishing with age as is known, to be the case in other 
rubber trees and in any case it might be possible to eliminate some 
of the resin by a suitable method of coagulating the latex. This of 
course will have to be determined by experiments. The sample of 
Ficus rubber sent by Mr. CALLOWAY was much superior to any 
other specimens of this rubber recived at the Imperial Institute and 
it therefore appears probable that a considerable improvement in 
the quality of the rubber could be effected by the application of 
proper methods. If so the price would be correspondingly increased. 
GETAH (GETAH JELUTONG) FROM SARAWAK 
This specimen of Getah Jelutong and samples of a mineral sub- 
stance used in its preparation were forwarded from Sarawak, 
through His Majesty’s Consul at Brunei, for examination in the 
Scientific and Technical Department of the Impeiial Institute, and 
are described in despatches, copies of which were transmitted to the 
Imperial Institute by the Foreign Office. 
From the correspondence accompanying the samples it appears 
that the mineral substance used in the preparation of the Getah or 
Gutta is obtained from China, and is known to the Malays as 
if Menang Sayla,” and to the Chinese as “ Chio Koh.” This sub- 
stance is not employed in its natural condition, but is baked before 
use, being reduced thereby to a kind of feathery powder, and its 
