( 19 ) 
Balata. Mimusops Balata. 
This South American tree, and possibly some of 
Its nearly related species, furnishes the best known 
substitute for gutta percha. It is intermediate in 
properties between rubber and gutta percha, is 
obtained in fairly large quantities, and is used as 
a substitute for gutta percha for a number of 
special uses. 
Wild Rubber. 
Various forms of wild rubber, probably mainly 
the product of various species of Willughbeia and 
Chilocarpus , are sometimes used to adulterate gutta 
percha by native collectors. 
Jelutong. Dyera spp. 
The copious latex of this large tree is one of the 
most extensively used adulterants of gutta percha. 
;Such adulteration is very often done by the collectors, 
to increase the bulk or appearance of the product, 
and it is even claimed that some Chinese dealers in 
Singapore use it. 
VI.— TRADE IN GUTTA PERCHA AT 
SINGAPORE. 
Getah taban merah, at the end of 1919, had a 
.selling price per pikul of $760 (£1,192 per ton). 
Low^er grades of gutta have been valued at corres- 
pondingly lower rates. Getah taban puteh ( Pala - 
quium obovatum C. B. Clarke) has sold for as much 
as $200 per pikul. Numerous other grades are not 
used because they contain too large a proportion of 
xesin, or of impurities. 
