57 
So far as the analyses go, the figures are in f^wterei^bSt 
tion, and this has found due recognition on ‘ h , e ^“^h^rnrice than 
rlrv block crepe and other forms have fetched a hi & her pric 
S£'d In -KS “by ,h’. ««”! * sz 
As the best block, crepe, and sheet are was ^^ p 
5*jttis£zZ£2 -S r HS3rs 
therefore first to be subjected to a , wa * hl " g .P r0 ^ pr " .. is affected and 
torn to shreds, in the course of which its nerve is attectea, anu 
then subsequently to be submitted to a tedious drying P rocess > an< ?'‘ 
possible Storage, "in order that the rubber may regain some of the 
SgJiiiii £$531 
hard-cure Para, amounts to from 13 to 17 P er cent. 
In order to test the value of plantation 
prepared rubbers, something more is required ‘han che 1 y 
As for practical purposes it may be said . ^nfced 
in the course of manufacture, and as the properties 
rubber are very different from the raw article, it appea a tion 
Selnly satisLtory means of 
rubber was to vulcanise it, and carry P . ■ ■ _ P i; m inate as far as 
on the vulcanised product. Moreover in ° f de to eliminate as tar 
possible the effect of carrying out * made a number of parallel 
instead of on a manufacturing scale, we ™ e p a rawhich was treated 
experiments with a sample of typical . the dantation rubber. 
preliminary treatment. 
