IV Journal of Agricultural Research voi.xv 



Page 



Observations on an Outbreak of Favus. B. A. Beach and J. G. 



Hal,pin 415 



Contributions to the Biology of Fruit-Fly Parasites in Hawaii. 



C. E. Pemberton and H. F. Willard 419 



Observations and Experiments on Intestinal Trichinae. Benja- 

 min Schwartz 467 



Experiments on the Value of Greensand as a Source of Potassium 



for Plant Culture. Rodney H. True and Fred W. Geise. . . 483 



Effect of Farm Manure in Stimulating the Yields of Irrigated 



Field Crops. C. S. Scofield 493 



Relation of Inorganic Soil Colloids to Plowsole in Citrus Groves 



in Southern California. Charles A. Jensen 505 



Seedling Diseases of Conifers. Carl Hartley, T. C. Merrill, 



and Arthur S. Rhoads 521 



Histological Studies on Potato Leafroll. Ernst F. ArT- 



schwagER 559 



Bacteriological Studies on Alfalfa Silage. O. W. Hunter 571 



Brown Canker of Roses, Caused by Diaporthe umbrina. Anna 



E. Jenkins 593 



Effect of Carbon Disulphid and Toluol upon Nitrogen-Fixing and 



Nitrifying Organisms. P. L. GainEy 601 



Multiple Pipette Holder for the Distribution of Serum for the Com- 

 plement-Fixation Test. Francois H. Reynolds 615 



Parasitism, Morphology, and Cytology of Cronartium ribicola. 



Reginald H. Colley 619 



Further Data on the Susceptibility of Rutaceous Plants to Citrus- 

 Canker. H. Atherton Lee 661 



Index 667 



ERRATA AND AUTHORS' EMENDATIONS 



Page 68, first table, last column, "0.0177" should read "0.0117." 

 Page 72, next to last line, "0.0352 " should read "0.0252." 

 Page 74, fifth line, "celloid" should read "colloid," 



Page 477, legends for figures 2 and 3, "Trichina" should read "Trichinella." 



Page 482, fifth citation the title of the book ends with the word "Heidelberg." The words "Von 

 Christ" which follow are part of the name of Fuchs and should read "Von Christ Jos. Fuchs und, etc." 



