ANNOUNCEMENT 
With the beginning of 1919 the sections of the Philippine 
Journal of Science will be combined, and the publication will 
be issued as a monthly; each number will be larger than the 
present bimonthly issues. The policy with regard to the char- 
acter and scope of the material published will be continued. 
The Journal is intended to be as it has been, the scientific organ 
of the Philippine Government, and will be devoted to the scien- 
tific and commercial interests of the tropics. Its aim will be 
to collect and publish in one place original scientific informa- 
tion and material relating to the Philippine Islands. Suitable 
articles will receive prompt publication in the Philippine Journal 
of Science, and specialists working on Philippine material will 
continue to receive hearty codperation. 
The subscription price will be 5 dollars United States cur- 
rency per annum. A refund of 2 dollars will be made to anyone 
that has forwarded a subscription for the four sections of the 
Journal at the old rate of 7 dollars. Any sum received as a 
subscription to a single section. will be credited, and a bill will 
be rendered for the balance due at the new rate. 
The Philippine Journal of Science in its new form will be 
sent in exchange to all periodicals and institutions with which 
exchange relations are in force. 
THE EDITORS. 
MANILA, P. I., December 31, 1918. 
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