JOORNAL OF ACMffllTiAL RESEARCH 
Vol. XXIII. Washington, D. 0., January 6-Maroh 31, 1923 
CONTENTS 
A Phytophthora Footrot of Rhubarb. George H. Godfrey (3 text figures; 
12 plates)... 
Sand Brown, a Chlorosis of Tobacco Due to Magnesium Deficiency, and the 
Relation of Sulphates and Chlorids of Potassium to the Disease. W. W. 
Garner, J. E. McMurtrey, C. W. Bacon, and E. G. Moss (7 plates). 
Parasitism of Sclerotium rolfsii on Irish Potatoes. H. A. Edson and M. Shapo- 
vaeov (3 plates). 
Examination of Authentic Grape Juices for Methyl Anthranilate. Frederick 
B. Power and Victor K. Chesnut. 
Effect of Various Inorganic Nitrogen Compounds, Applied at Different Stages 
of Growth, on the Yield, Composition, and Quality of Wheat. JehiEE 
Davidson and J. A. LeCeErc... 
Poisonous Properties of Bikukulla cucullaria (Dutchman’s Breeches) and 
B . canadensis (Squirrel Corn). O. F. Beack, W. W. EggeESTon, J. W. 
Keeey, and H. C. Turner (i plate). 
Forcing the Germination of Freshly Harvested Wheat and Other Cereals. 
George T. Harrington.'... 
A New and Efficient Respirometer for Seeds and Other Small Objects: Direc¬ 
tions for its Use. George T. Harrington and Wieeiam Crocker (2 text 
figures; 1 plate).. 
Respiration of Apple Seeds. George T. Harrington. 
A Cytological Study of Infection of Baart and Kanred Wheats by Puccinia 
graminis tritici. Ruth F. AeeEN (6 plates). 
After-Ripening and Germination of Apple Seeds. George T. Harrington 
and Bertha C. Hite. 
Miscellaneous Tests of Carbon Tetrachlorid as an Anthelmintic. Maurice C. 
Haee and Jacob E. Shieeinger. 
Structure, Physical Characteristics, and Composition of the Pericarp and 
Integument of Johnson Grass Seed in Relation to its Physiology. George 
T. Harrington and Wieeiam Crocker (10 text figures). 
Probable Cause of the Toxicity of the So-Called Poisonous Greensand. J. W. 
Keeey (3 plates). 
Two Important New Types of Citrous Hybrids for the Home Garden—Citran- 
gequats and Limequats. Waeter T. Swingee and T. Raeph Robinson (5 
plates).. 
Production and Dispersal of Conidia in the Philippine Sclerosporas of Maize. 
Wieeiam H. Weston, Jr. (2 text figures; 10 plates). 
Mechanics of Inoculation with §ugar-Cane Mosaic by Insect Vectors. E. W. 
BrANDES (2 plates).. 
Relation of Potato Skinspot to Powdery Scab. Michaee Shapovaeov (i text 
figure; 4 plates). 
Use of Alternating Temperatures in the Germination of Seeds. George T. 
Harrington (20 text figures).. 
Water Content of Barley Kernels during Growth and Maturation. H. V. 
Harean and Merritt N. Pope (15 text figures). 
Bacterial Leafspot of Geranium in the Eastern United States. NeeeiE A. 
Brown (3 plates). 
Hydrogen-ion Concentration and Varietal Resistance of Wheat to Stem Rust 
and Other Diseases. Annie May Hurd. 
Cotton-Wilt, a Seed-Borne Disease. John A. Eeeiott (2 plates). 
Iron and Manganese Content of Certain Species of Seeds. J. S. McHarguE. .. 
Studies Upon the Life Cycles of the Bacteria—Part II: Life History of Azo- 
bacter. F. LOhnis and N. R. Smith (9 plates). 
Influence of Fertilizers Containing Borax on the Growth and Fruiting of Cotton. 
J. J. Skinner and F. E. Aeeison (4 plates). 
Genetics of Bunt Resistance in Wheat. E. F. Gaines (2 figures; 3 plates). 
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