1M 
" bur tapping is always done in the dry geason—from July to 
ecem 
* The average yield per tree is vet. ay r kilos. m to 3 Ibs.) 
per year; coagulation may be effec urning, or by the 
addition of an excess of water, or a 2er In the former 
case the rubber particles which are unprotected by any film (as 
the fat particles of milk are) simply adhere to form a mass. 
- “Tn the case of the addition of excess of water, salt, or smoking, 
eoagulation is brought about by means of the globulin present 
(Green, Proc. Roy. Soc., 1886, p. 39). This coagulates at 74-76° C., 
or on dilution, ete. and tangles up the rubber particles in its 
meshes, much as white of egg gathers up particles in suspension 
when used for clearing jellies." 
SUMMARY. 
The result of experience so far gained in the experimental : 
cultivation of the Ceara rubber plant may be summarised as 
ll 
The plant is ded propagated both from seeds and cuttings. 
Seeds are abundantly produced in almost every part of the world 
where the plant M been introduced. They may be gathered 
from plants when only three to five years old. "There is therefore 
the great advantage that a large area could be planted within a 
comparatively short period. Sowing the seeds in the position 
— they are to grow permanently is universally adopted in 
Brazi It is possible, if adopted aleewhere, this plan would 
sete reduce the cost of establishing plantations. 
2. The Ceara rubber plant is very hardy, a fast grower, free 
from insect and fungoid attacks, requires Tittle or no attention 
w 
unsuited to almost any other crop. It is evident, however, that 
the yield of a few trees cannot be remunerative and only large 
areas can hope to make the industry a paying one. 
. It produces a good class of rubber, vds only when well 
prepared to the best Para rubber. For this there is a steady and 
continuous demand. The yield per tree is — small, but 
an 
with skilful treatment the permanent trees re e X" wice 
yearly and last in a productive state for 15 to 20 y 
4. In spite therefore of the apparent want b success which 
so far has attended experiments with Ceara rubber plants in 
Qeon and other countries, the increasing importance of rubber 
as an article in large demand in all civilized countries at good 
prices, suggests a reconsideration of the merits of this interesting 
lant. In many of our colonies possessing a dry climate and a 
poor stony soil, it is possible that large areas could be profitably 
occupied with Ceara rubber trees so grown as to provide annual 
-erops for tapping. 
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