XVIII Journal of Agricultural Research voi. xvin 



Page 

 Fig. 2. Water cultures, series i. Graphs showing comparison between per- 

 centage of total nutrient absorbed and percentage of total water 

 transpired with solutions of four concentrations 90 



3. Water cultures, series 2. Graph showing absorption of nutrients from 



solutions of three concentrations during latter part of growth cycle . 92 



4. Water cultures, series 3. Graph showing absorption of nutrients from 



solutions of two concentrations and two reactions 94 



Recent Studies on Sclerotium roufsii vSacc. 



Fig I. A, intracellular nattu-e of Sclerotium rolfsii hyphae in cantaloupe tissue; 

 B and C, manner in which the fungus pierces host cells; D, E, and F, 

 method of budding and formation of new mycelial growth; G, man- 

 ner of growth of mycelium, forming strands; H, dissolved middle 

 lamellae of host cells 134 



Yellow-Berry in Hard Winter Wheat 



Fig. I. Percentage by weight of yellow-berry kernels in pure-bred wheats and 



their control, 1908 162 



2. Relation between date of harvesting and percentage of yellow-berry. . 163 



Bacteuial Blight of Soybean 



Fig. I. Bacterium glycineum: From 72-hour growth on potato agar, stained by 



Duckwall 's method to show fiagella 182 



Nature and Control op Apple-Scald 



Fig. I. Relative rate of cooling of apples in commercial and ventilated barrels: 



A, Grimes apples in a storage room already filled with cold fruit; 



B, York Imperial apples in a storage room still receiving a large bulk 



of warm fruit 232 



2. Relative carbon-dioxid content of the air in ventilated and commer- 

 cial barrels during the first weeks of storage: A, Grimes apples in a 

 storage room already filled with cooled fruit; B, York Imperial apples 

 in a storage room still receiving a large bulk of fresh fruit 233 



Nitrogen Metabolism of Two-Year-Old Steers 



Fig. I. Nitrogen metabolism of steers in the maintenance lot 243 



2 . Nitrogen metabolism of steers in the one-third feed lot 249 



3. Nitrogen metabolism of steers in the two-thirds feed lot 250 



4. Nitrogen metabolism of steers in the full feed lot 251 



Physiological Study of the Parasitism of Pythium debaryanum Hesse 

 ON the Potato Tuber 



Fig. I. Drawing to illustrate growth of a Pythium hypha in potato tissue 290 



2. Drawing to illustrate method of cell-wall penetration in cells I, IV, 



and V 291 



Cotton Rootrot Spots 



Fig. I. Diagram of plot B5-4, showing by the brushlike lines the portions of 



the rows in which the cotton plants were killed by rootrot in 19 16 306 



2. Diagram of plot B5-4, showing by the heavy lines the portions of the 



rows in which the cotton plants were killed by rootrot in 19 17 307 



