4884 
JOML OF MOinm RESEARCH 
V0I4. XXIV 
Washington, D. C. 
Aprii, 7-Jun^ 30, 1923 
CONTENTS 
Temperature Relations of Eleven Species of Rhizopus. T. E. Whimer and 
E. E. Harter (23 text figures).... i 
Nutrition of Plants Considered as an Electrical Phenomenon. T>^Es F. 
Breazeai^E (p text figures)..... . j 
Influence of Soil Temperature and ^il Moisture upon the Fusarium Disease 
in Cabbage Seedlings. William B. Tisdale (10 text figures; 2 plates)..... cc 
Action of Soap upon Eead Arsenates R. M. PincXney..... '.... 87 
Physiological Requirements of Rocky Mountain Trees. Carlos G. Bates ^ 
(S text figures; 7 plates)........... 
Study of the Internal Browning of the Yellow Newtown Apple. A. T. 
Winkler (2 text figures; i plate).... ;........... 165 
On the Use of Calcium Carbonate in Nitrogen Fixation l^periments.^ P. E ^ 
Gainey... .......... ..... ige. 
Gummosis of Citrus. Howard S. Fawcett (8 plates). ‘! joJ. 
Occurrence and Significance of Phloem Necrosw in the Irish Potato. ERNst 
F. Artschwager (3 text figures; 5 plates)....... 357 
Cultivated and Wild Hosts of Sugar-Cane or Grass Mosaic. E. W. Brandes 
and Peter J. Klaphaak (4 plates).... 347 
Protein Synthesis by Azotobacter. O. W. Hunter...*; 367 
Studies on the Temperature of Individual Insects, with Special Reference to ' 
A Gregor B. Pirsch (i text figure; i plate).............. 37^ 
A study of the Effect of Changing the Absolute Reaction ci &)ils upon their 
Azotobacter Content. P. E. Gainey...... 380 
O^dation of Sulphur by Microorganisms in Black Alkali Soils. Sblmai^ A. ) 
_ Waksman^Clara H. Wark, Jacob Joppe, and Robert E. Sharkey...... 307 
j^ach Rbsette, an Infectious Mosaic. J. A. McClintock (10 plates); .:. >. i.. ^67 
Antagonism of Various Alkali Salts in the &il. F. S. Harris, ■ ^ 
M. p. TiabMAS and D. W. Pittman (13 text figures) .................'.:.... 317 
Identification of Certain Species of Fusarium Isolated from Potato Tubers iii 
Montana. H. E. Morris and Grace B. Nutting (3 plates)_ ....... 3^0 
Determination of Fatty Acids in Butter Fat: H. E. B. Holland, MAry e’. ' ' 
Garvey, H. B. Pierce, Anne C. Messer, J. G. Archibald, and C. O. 
Dunbar. .;... r...........365 
Striped Sod Webworm,^ Cramhus mutahilis Clemens. George G. AinsliE 
(2 text figures; 2 plates)........ 300 
Silver-Striped Webworm, CrawftMjZincken. George G. Ainslie ” 
(2 text figures; I plate)........._.....41 e 
Movement df Soil Moisture from Small Capill^es to the E^e Capillaiies erf 
the ^il upop Freezii^. George John Bouyoucos (i plate)........ ■..... 427 
Nutritive Vialiie of the Geofgia Velvet Bean (Stizilobium deeringianum). J. W. 
Read and Barnett Sure (ii text figures)........ 433 
Species of Rhizbpm Responsible for the Decay of Sweet Potatoes in the Storage 
House and at Different Temperatures in Infection Chambers. J. I. Eaur- 
ITZEN and E* E. Harter (i text figure)..... ^ 
The Iidieritance of Growth Habit and Resistance to Stem Rust ip a Cross 
between Two Varieties of Common Wheat. Olap S. Aamodt (i text figure* 
2 plates)..........®_ 
Effect of Organic Decomposition Products from High Vegetable Omtent ^ils 
upon Concrete Drain Tile. G. R. B. Elliott (7 plates). . 471 
Inpinr to Foliage by Arsenical Spray Mixtures. D. B. Swingle, H. E. Morris, 
and Edmund Burke (i plate). 501 
A Statistical Study of the Comparative Morphology of Biologic Forms of Ptic- 
cinia graminis, M. N. Eevine (14 text figures; 2 plates). 530 
Relation of Certain Soil Factors to the Infection of Oats by Eoose Smut. 
Eucille K. Bartholomew and Edith Seymour Jones (2 text figures).... 569 
Influence of Temperature, Moisture, and Oxygen on the Spore Germination of 
Ustilago avenae, Edith Seymour Jones (3 text figures). 577 
48327—24 (l) 
