* - "* 



isa 



CONTENTS 



Fase 



WALKER, ERNEST LINWOOD. Quantitative Determination of 

 the Balantidicidal Activity of Certain Drugs and Chemicals as 

 a Basis for Treatment of Infections with Balantidium coli 1 



ASHBURN, P. M., VEDDER, E. B., and GENTRY, E. R. The 



Relationship of Variola and Vaccinia 17 



MITZMAIN, M. BRUIN. The Bionomics of Stomoxys calcitrans 



Linnaeus; A Preliminary Account 29 



WILLETS, DAVID G. General Conditions Affecting the Public 



Health and Diseases Prevalent in the Batanes Islands, P. I.... 49 



BOYNTON, WILLIAM HUTCHINS. A Study of the Normal 



Blood of the Carabao 59 



u. 8. 



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