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letin No. 16 of the Federal Experiment Station. This Bulletin 
contains much valuable information and is an important contri- 
bution to our knowledge of rubber in Hawaii. Much however 
still remains to be done before the rubber industry can be re- 
garded as firmly established. Especially important at present 
are accurate figures on the cost of collecting the latex and putting 
it into shape as a market product at a profit. To secure data on 
these points this Division has undertaken cooperative experi- 
ments with the Federal Experiment Station and with the four 
rubber companies at Nahiku. The Federal Experiment Station 
furnishes the agent in local charge, the rubber plantations furnish 
laborers to do the actual work, and this Division pays the salary 
of the agent in charge and the incidental expenses. 
The four main points to be investigated are : 
First: The cost of tapping;. 
Second : The best methods of tapping ; 
Third: Methods of chemical control, especially in dealing 
with scrap rubber ; and 
Fourth : The effect of cultivation and fertilization on the 
growth of the trees and the yield of latex. The tapping will be 
carried on on a sufficiently large number of trees and for a long 
enough time to give results that shall have direct commercial 
bearing. The chemical work will be carried on by the chemist at 
the Federal Station in the laboratory of the station at Honolulu, 
there being a sufficient number of trees on the Experiment 
Station Grounds to yield the necessary quantity of latex for this 
work. One of the most striking things about, the plantations at 
Nahiku is the way in which the trees have responded to cultiva- 
tion. One of the objects of the experiment will be to ascertain 
how cultivation and fertilization may most judiciously be em- 
ployed to hasten the growth of the trees and to increase the flow 
of latex during the tapping season. 
PLANT INTRODUCTIONS. 
During the past three months satisfactory progress has been 
made at the Experimental Garden at Makiki Valley. Within 
the past year seed of many valuable plants new to the Territory 
have been received by this Division. Many of these plants care- 
fully propagated at the Government Nursery have already or 
soon will be planted in the Makiki Garden where they can be 
regularly observed and from whence in time seed and cuttings 
can be distributed. 
mocha coffee; 
Some little time ago Mr. G. R. Ewart brought from Mexico 
the seed of the Mocha Coffee. This shipment has been propa- 
gated at the. Government Nursery — the first time this plant has 
