13 
The venally accepted explanation of this is that the water 
contained in the latex is simply evaporated off ;* pat as the 
coagulation is brought abou in so short a time, and moreover as 
there is no loss of weight on its occurrence, thig is ad. 
incorrect. 
nd e for t 
consist mainly of edi acid, sad the later of creosote aaa ene 
of AR eraio tiv 
case lime-juice is added,t and Helfer "8 food of ad ing acetic 
acid to the latex of Artocarpus Ohiplash (Roxb.),f may be 
Eus 
It is worthy of note that the latex of Hevea br t" is in 
itself alkaline, and that the addition of a solution ammonia 
pee method of clotting latex is to add an excess bd common 
lt. This me thod is almost invariably applied in the case of 
e “ma i 
Coagulation may also be brought about NE boiling the latex, as, 
for e example, in the preparation of “balata” from Mimusops 
globosa in Venezuela and Trinidad. 
There are several other methods in general use besides the few 
that have been quoted, and many others have been suggested from 
time X time}. 
As the rubber exists in particles in the latex, it seemed possible 
that the centrifugal method of separation might be adopted in 
modi 
the ordinary centrifugal milk-tester was, S designed 
capable of being rotated some 6,000 times per minu 
Ernst, Trinidad Bulletin, vol. iii., p. 2 
Kew balleta. 1890, Art. 142, La 89 
+ 
t Watt's Dict. Economic Prod ip. 13. vol, iv., p. 343. 
§ Belt, Naturalist in Nidseifun, v 
gp a orem ete account, see de Caoutchouc et la Gutta-percha, pen 
Lamy, and Falconnet, Paris, 1896, 
