CONTENTS 



Page 



Phoma Destructiva, the Cause of a Fruit Rot of the Tomato. 



Clara O. Jamieson i 



Availability of the Nitrogen in Pacific Coast Kelps. Guy R. 



Stewart 21 



Organic Constituents of Pacific Coast Kelps. D. R. Hoagland ... 39 



Sources of the Early Infections of Apple Bitter- Rot. John W. 



Roberts 59 



A Bacteriological Study of Methods for the Disinfection of Hides 



Infected with Anthrax Spores. F. W. TillEy 65 



Observations on Rhizina Inflata. James R. Weir 93 



Pseudomonas Citri, the Cause of Citrus Canker. Clara H. Hasse . 97 



Wilt of Gipsy-Moth Caterpillars. R. W. GlasER loi 



Effect of Temperature on Germination and Growth of the Common 



Potato-Scab Organism. Michael Shapovalov 129 



Seedling Diseases of Sugar Beets and Their Relation to Root-Rot 



and Crown-Rot. H. A. Edson 135 



Phoma Betae on the Leaves of the Sugar Beet. Venus W. Pool 



and M. B. McKay 169 



Notes on the Hydrocyanic-Acid Content of Sorghum. J. J. WiL- 



Laman and R. M. WEST 179 



Effect on Soil Moisture of Changes in the Surface Tension of the 



Soil Solution Brought About by the Addition of Soluble Salts. 



P. E. Karraker 187 



Relation Between Puccinia Graminis and Plants Highly Resistant 



to Its Attack. E. C. Stakman 193 



Antagonism Between Anions as Affecting Barley Yields on a 



Clay- Adobe Soil. Charles B. Lipman and W. F. Gericke. ... 201 



A New Wheat Thrips. E. O. G. Kelly 219 



Cytological Studies of Azotobacter Chroococcum. AugusTO 



Bonazzi 225 



Influence of Soil Moisture upon the Rate of Increase in Sugar-Beet 



Root-Louse Colonies. J. R. Parker 241 



A New Leaf and Twig Disease of Picea Engelmanni. JamES R. 



Weir 251 



Some Sugar-Cane Root-Boring Weevils of the West Indies. W. 



Dwight Pierce 255 



ni 



