JOURNAL OF 



AGRICULTURAL 



RESEARCH 



CONTENTS 



Page 



Experiments in the Use of Current Meters in Irrigation 

 Canals 217 



S. T. HARDING 



Relation of Sulphur Compounds to Plant Nutrition . 233 



E. E. HART and W. E, TOTTINGKAM 



Distribution of the Virus of the Mosaic Disease in 

 Capsules, Filaments, Anthers, and Pistils of Affected 

 Tobacco Plants . . . . . , . .251 



H. A. ALLARD 



Dissemination of Bacterial Wilt of Cucurbits . . . 257 

 FREDERICK V. RAND 



DEPARTMENT OF AGRICULTURE 



\\'ASHINGTON , D.C. 



INGTON : oovcn:(HCNT PRr^^TlNC• cr 



