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

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

 1910 will be as herotofore, $5 United States currency. Single subscriptions to Section D will 

 be $2 United States currency. 



Beginning with 19.11, 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. 

 RICHMOND, GEORGE F. Tayabas Petroleum 1 



GIBBS, H. D. The Compounds which Cause the Red Coloration of 

 Aniline: I. The Effect of Oxygen and Ozone and the Influence of Light 

 in the Presence of Oxygen 9 



HULBURT, CLINTON H., and BACON, R. F. A Liquid Concave 



Mirror 19 



HOLMES, W. C. Distilled Liquors: Whisky (Rye, Bourbon and Scotch), 



Brandy (Cognac) and Gin 23 



VIVENCIO DEL ROSARIO, MARIANO. On the determination of Al- 

 dehydes in Distilled Liquors 29 



GIBBS, H. D., and AGCAOILI, F. Lard from Wild and Domestic Phil- 

 ippine Hogs and the Changes in the Constants Produced by Feeding ' 

 Copra Cake 33 



EDITORIAL 45 



REVIEWS .: 55 



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