JOURNAL OF AUCOLim RESEARCH 
Vol. XXVIII Washington, D. C. April 5-June 28, 1924 
CONTENTS 
Page 
Anatomy and Metamorphosis of the Apple Maggot Rhagoletis pomonella 
Walsh. It. E. Snodgrass (8 text figures; 6 plates)- 1 
Chemical and Biological Studies with Cyanamid and Some of its Trans¬ 
formation Products. K. D. Jacob, F. E. Allison and J. M. Braham 
(12 test figures)___ 37 
Grossularia echinella, a Spiny-Fruited Gooseberry from Florida. Fred¬ 
erick V. Coville (1 plate)_ 71 
Fowl Typhoid, its Dissemination and Control. B. F. Kaupp and It. S. 
Dearstyne (2 text figures)_ 75 
Effects of the Modified Hot-Water Treatment on Germination, Growth 
and Yield of Wheat. V. F. Tapke (5 plates)-- 79 
Types of Vegetation in the Semiarid Portion of the United States, and 
their Economic Significance. A. E. Aldous and H. L. Shantz (1 map; 
16 plates)_ 99 
The Development of American Foulbrood in Relation to the Metabolism of 
its Causative Organism. A. P. Sturtevant (17 text figures)_ 129 
Brittle Straw and Other Abnormalities in Rye. F. R. Davidson, H. E. 
Brewbaker and N. A. Thompson (2 text figures)__ 169 
Relation between Toxicity of Cottonseed and its Gossypol Content. . 
Erich W. Schwartze and Carl L. Alsberg (13 text figures)- 173 ^ 
Pharmacology of Gossypol. Erich W. Schwartze and Carl L. Alsberg 
(2 plates)._... _____ 191^ 
The Relation of Antecedent Egg Production to the Sex Ratio of the 
Domestic Fowl. M. A. Jull___ 199 
A Gradient of Permeability to Iodin in Wheat Seed Coats. Harry 
Braun____ _ 225 
Further Studies on the Relative Susceptibility to Citrus Canker of Dif¬ 
ferent Species and Hybrids of the Genus Citrus, Including the Wild 
Relatives. George L. Peltier and William J. Frederich_ 227 
Relation of Environmental Factors to Citrus Scab Caused by Clado - 
sporium citri Masse. George L. Peltier and William J. Frederich 
(2 text figures)_ 241 
A Study of Ensiling a Mixture of Sudan Grass with a Legume. P. A. 
Wright and R. H. Shaw_ 255 ^ 
Bacterial Leafspot of Delphinium. Mary K. Bryan (4 plates)- 261 
Further Observations on the Molts of the Ox Bots Hypoderma bovis De 
Geer and H. lineatum Villers. E. W. Laake_ 271 
Flavobacterium suaveolens , a New Species of Aromatic Bacillus Isolated / 
from Dairy Wastes. Lulu Soppeland___ 275 
Some Relations between the Growth and Composition of Young Orange 
Trees and the Concentration of the Nutrient Solution Employed. 
H. S. Reed and A. R. C. Haas (1 plate)_ 277 
The Germination of Cottonseed. Eben H. Toole and Pearle L. Drum¬ 
mond (2 plates)___ 285 
The Salt Content of Cotton Fiber. Thomas H. Kearney and C. S. 
Scofield__... 293 
Studies on Curly-Top Disease of the Sugar Beet. Eubanks Carsner 
and C. F. Stahl (1 text figure; 5 plates)_ 297 
Pecan Scab with Special Reference to Sources of the Early Spring Infec¬ 
tions. J. B. Demaree (2 plates)._ 321 
Anthelmintic Efficiency of Carbon Tetrachlorid in the Treatment of 
Foxes. Karl B. Hanson and H. L. Van Volkenberg_ 331 
The Chemical Composition of Edible Viscera from Meat-Producing 
Animals. Wilmer C. Powick and Ralph Hoagland_ 339 
Fumigation of Bean Weevils, Bruchus obtectus Say and B. quadrimaculalus 
Fab. A. O. Larson_ 347 
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