The Philippine Journal of Science 



Edited by 



PAUL C. FREER, M. D., Ph. D. 



RICHARD P. STRONG, Ph. B., M. D., Co-Editor. 



Tiie "Philippine Journal of Science" is issued as follows: 



Section A. General Science, $2, United States currency, per year. 

 Section B. Medical Sciences, $ 3, United States currency, per year. 

 Section C. Botany, $2, United States currency, per year. 



The entire "Journal," ^5, United States currency, per year. 



Single numbers, 50 cents. United States currency. 



Authors receive 100 copies of their papers free. 



Each section is separately paged and indexed. 



Subscriptions should be sent to the Business Manager, Philippine 

 Journal of Science, Manila, P. I., or to any of the below-listed agents. 



FOREIGN AGENTS. 



THE MACMILLAN COMPANY, 64-66 Fifth Avenue, New York. 

 Messrs. WM. WESLEY & SON, 28 Essex Street, Strand, London, W. C. 

 MARTINUS NIJHOFF, Nobelstraat 18, 's Gravenhage, Holland. 

 Messrs. MAYER & MULLER, Prinz Louis Ferdinandstrasse 2, Berlin, N. W. 

 Messrs. KELLY & WALSH, LIMITED, 32 Raffles Place, Singapore, S. S. 

 Messrs. A. M. & J. FERGUSON, 19 Baillie Street, Colombo, Ceylon. 



A limited number of unbound copies of previous volumes are available, 

 which may be secured from the Business Manager at the following rates: 

 Volume I, 1906 (not divided into sections), $5, United States currency; 

 Supplement to Volume I, $2.50, United States currency; Volume I 

 (without supplement), $3, United States currency; all later volumes at 

 current subscription prices. 



(Copyr1t;h1e«1 in the Philippinn Islandx, September, 10O7. Entered at the poKt-ufllce 

 at Manihi, P. I., um H(M;on<l-chiKs iiintter.) 



