Vol. Ill JANUARY, 1915 No. 4 



JOURNAL OF 



AGRICULTURAIv 



RESEARCH 



CONTENTS 



' . ■ ^ Pag« 



Observations on the Life History of AiJrilus Bilineatus . 283 

 ROYAL K. CHAPMAN 



Effect of Dilution upon the Infectivity of the Virus of the 



Mosaic Disease of Tobacco 2Q5 



H. A. ALLARD 



Moldiness in Butter 301 



CHARLES THOM and R. H. SHAW 



Susceptibility of Citrous Fruits to the Attack of the Medi- 

 terranean Fruit Fly . 311 



E. A. BACK and C. E. PEMBERTON 



Physiological Changes in Sweet Potatoes during Storage . 33 1 

 HEIWEICH HASSELBRING and LON A. HAWKINS 



Three-Cornered Alfalfa Hopper 343 



V. L. WILDERWLUTH 



DEPARTMENT OF AGRICULTURE 



WAS HINGTON , D.C. 



WAliMINOrOK I GOVERNMfXT MUNTINO OFFlOt I «1» 



