Ausländische Literatur. 



747 



— 116. — Peltier, G. L., Susceptibility and Resistance to Citrus-Canker of the 

 Wild Relatives, Citrus Fruits, and Hybrids of the Genus Citrus. 337 — 357; 

 4 Taf. — Arny, A. C, and Garber, R. J., Variation and Correlation in Wheat, 

 with Special Reference to Weight of Seeds Planted. 359 — 392. — Peltier, G. L., 

 and Neal, D. C, Overwintering of the Citrus-Canker Organism in the Bark Tis- 

 sue of Hardy Citrus Hybrids. 523 — 524; i Taf. — Harrington, G. T., and Crocker, 

 W., Resistance of Seeds to Desiccation. 525 — 532. — Kunkel, L. O., Tissue 

 Invasion by Plasniodiophora brassicae. 543 — 572; 20 Taf. — Hartley, C, Stem 

 Lesions Caused by Excessive Heat. 595 — 604. 



Bd. XV, 1918. Crocker, W., and Harrington, G. T., Catalase and Oxidase 

 Content of Seeds in Relation to Their Dormancy, Age, Vitality, and Respiration. 

 137 — 174. — Stakman, E. C, Piemeisel, F. J., and Levine, M. N., Plasticity 

 of Biologie Forms of Puccinia graminis. 221 — 249; 2 Taf. — Sasscer, E. R., 

 and Dietz, H. F., Fumigation of Cattleya Orchids with Hydrocyanic-Acid Gas. 

 263 — 268; 2 Taf. — True, R. H., Physiological Studies of Normal and Blighted 

 Spinach. 369 — 370. — Hartley, C, Merrill, T. C, and Rhoads, A. S., Seedling 

 Di.seases of Conifers. 521 — 558; i Taf. — Artschwager, E. F., Histological Stu- 

 dies on Potato Leafroll. 559 — 570; 12 Taf. Hunter, O.W., Bacteriological 

 Studies on Alfalfa Silage. 571 — 592. Jenkins, A. E,, Brown Canker of Roses, 

 Caused by Diaporthe umbrina. 593 — 599; 3 Taf. — Gainey, P. L., Effect of 

 Carbon Disulphid and Toluol upon Nitrogen-Fixing and Nitrifying Organisms. 

 601 — 614. — Colley, R. H., Parasitism, Morphology, and Cytology of Cronartium 

 ribicola. 617 — 659; 12 Taf. — ■ Lee, H. A., Further Data on the Susceptibihty 

 of Rutaceous Plauts to Citrus-Canker. 661 — 665; 4 Taf. 



Bd. XVI, 1919. True, R. H., Black, 0. F., and Kelly, J. W., Ash Absorp- 

 tion by Spinach from Concentrated Soil Solutions. 15 — 25. — Stakman, E. C., 

 and Levine, M. N., Effect of Certain Ecological Factors on the Morphology 

 of the L^rediniospores of Puccinia graminis. 43 — "jj. — Stakman, E. C, Levine, 

 M. N., and Leach, J. G., New Biologie Forms of Puccinia graminis. 103 — 105. 



— Tisdale, W. H., Physoderma Disease of Corn 137 — 154; 10 Taf. — Dowell, 

 C. T., Cyanogenesis in Andropogon Sorghum. 175 — 181. — McHargue, J.S., Effect 

 of certain Compounds of Barium and Strontium on the Growth of Plants. 183 

 — 194; I Taf. — Fromme, F. D., and Murray, T. J., Angular-Leafspot of Tobacco. 

 An Undescribed Bacterial Disease. 219 — 228; 3 Taf. — McClelland, T. B., In- 

 fluence of Foreign Pollen on the Development of Vanilla Fruits. 245 — 251; 

 5 Taf. — Mac Millan, H. G., Fusarium-Blight of Potatoes under Irrigation. 

 279 — -303; 5 Taf. — 



Bd. XVII, 1919. Johnson, J., and Hartman, R. E., Influence of Soil En- 

 vironment on the Rootrot of Tabacco. 41 — 86; 8 Taf. — Miller, H. C, Relation 

 of Sulphates to Plant Growth and Composition. 87 — 102; 4 Taf. — Dorsey, 

 M. J., Relation of Weather to Fruitfulness in the Plum. 103 — 126; 3 Taf. — 

 Collins, G. N., Structure of the Maize Ear asindicated in Zea-Euchlaena Hybrids. 

 127 — 135; 3 Taf. — Appleman, A., and Arthur, J. M., Carbohydrate MetaboHsm 

 in Green Sweet Corn during Storage at Different Temperatures. 137 — 152. 



— Reed, H. S., Certain Relationships between the Flowers and Fruits of the 

 Lemon. 153^165. — Russell, G. A., Effect of Removing the Pulp from Cam- 

 phor Seed on Germination and the Subsequent Growth of the Seedlings. 223 



— 237 ; 2 Taf. — Bück, J. M., Creech, G. T., and Ladson, H. H., Bacterium abortus 

 Infection of Bulls. 239—246; 3 Taf. — Schultz, E. S., Investigations on the 

 Mosaic Disease of the Irish Potato. 247 — 273; 8 Taf. 



Bd. XVIII, 1919/20. Willaman, J. J., Notes on the Composition of the 

 Sorghum Plant, i — 31. — Burd, J. S., Rate of Absorption of Soil Constituents. 

 et Successive Stages of Plant Growth. 51 — 72. — Hoagland, D. R., Relation 

 of the Concentration and Reaction of the Nutrient Medium to the Growth 

 and Absorption of the Plant. 73—117. — Taubenhaus, J. J., Recent Studies 

 on Sclerotium Rolfsii Sacc. 127—138; 4 Taf. — Coerper, F. M., Bacterial Blight 



