Vol. IV JULY, 1915 No. 4 



JOURNAL OF 



AGRICULTURAL 

 RESEARCH 



CONTENTS 



Page 



Rheosporangium Aphanidermatus, a New Genus and Species 

 of Fungus Parasitic on Sugar Beets and Radishes . . 279 



E. A. EDSON 



Heredity of Color in Phlox Drummondii 293 



ARTHUR W. GILBERT 



Asparagus-Beetle Egg Parasite 303 



F. A. JOHNSTON 



Inheritance of Certain Characters of Grapes . . . . 315 

 U. P. HEDRICK and R. D. ANTHONY 



Ascochyta Clematidina, the Cause of Stem-Rot and Leaf-Spot 



of Clematis . . 331 



W. O. GLOYER 



Methods of Bacterial Analyses of Air 343 



G. L. A. RUEHLE 



Wallrothiella Arceuthobii . .369 



JAMES R. WEIR 



DEPARTMENT OF AGRICULTURE 



WASHINGTON, D.C. 



WASHINGTON : GOVERNMENT PRINTINQ OFFICE : 16^5 



