Beginning with Volume V, a new section, "Section D, Ethnology, Anthropology, and Gen- 

 eral Biology," will be added to the Journal. The price for the whole series to subscribers for 

 igio will be as heretofore, $5 United States currency. Single subscriptions to Section D will 

 be $2 United States currency. 



Beginning with 1911, the price of the entire Journal will be increased to $7 United States 

 currency. Section D will appear as often as material is available. 



CONTENTS. 



Page. 



REIBLING, W. C, and REYES, F. D. Physical and 



Chemical Properties of Portland Cement 367 



GIBBS, H. D. The Compounds Which Cause the Red 

 Coloration of Aniline: II. The Effect of Sunlight 

 in the Absence of Oxygen and Oxidizing Influences 

 and a Comparison with the Behavior of Mono- and 

 Dimethylaniline 419 



BROOKS, B. T. The Natural Dyes and Coloring 



Matters of the Philippines 439 



Index, title-page and contents 453 



The "Philippine Journal of Soience" is issued as follows: 



Section A, Chemical and Geologioal Sciences and the Industries, $2 United States 



currency per year. 

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

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



Section D, Ethnology, Anthropology, and General Biology, $2 United States cur- 

 rency per year. 



The entire "Journal," $5 United States currenoy for Volumes II, HI, IV, and V. There- 

 after, $7 United States currenoy per year. 



Authors receive 100 oopies of their papers free. 



Subscriptions should be sent to the Business Manager, Philippine Journal of Soienoe, 

 Bureau of Soience, Manila, P. I., or to any of the agents listed below. Please give order 

 number. 



FOREIGN AGENTS. 



The Maomillan Company, 64r-66 Fifth Avenue, New York City, U. S. A. 



Messrs. Wm. Wesley & Son, 28 Essex Street, Strand, London, W. C, England. 



Mr. Martinus Nijhoff, Nobelstraat 18, The Hague, Holland. 



Messrs. Mayer & Muller, Prinz Louis Ferdinandstrasse 2, Berlin, N. W., Germany. 



Messrs. Kelley & Walsh, Limited, 32 Baffles Place, Singapore, Straits Settlements. 



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



Entered at the post-office at Manila, P. I., as second-class matter. 



A limited number of unbound copies of previous volumes are 

 available, which may be secured from the Business Manager, 

 Philippine Journal of Science, Manila, P. I., at the following 

 rates: Volume I, 1906 (not divided into sections), $10 United 

 States currency; Supplement to Volume I, $3.50 United States 

 currency; Volume I (without supplement), $6.50 United States 

 currency; all later volumes at current subscription prices. 



ffl) 



