Oct. 6-Dec. 29, X923 
Index 
621 
Plant— Page 
roots, carbon absorption by. 303-3n 
tissue, tannin content, quantitative estima¬ 
tion methods. 257-258 
Plants— 
injury by arsenicals, description and causes, 
discussion. 191-192 
juices of, cryscopic readings... 245, 
246,247,251,253,256 
Poison, cottonseed meal— 
effect of autoclaving, experiments. 9-10 
due to gossyphol. 233-237 
Pomeroy, C. S., Shamel. A. D., and Caryl, R. 
E.: Bud Selection as Related to Quantity 
Production in the Washington Navel 
Orange...319-32 2 
Potassium— 
absorption by plants, relation to sodium 
nitrate. 309 
losses from soils by weathering. 115 
Potassium chlorid, effect on soil acidity and 
calcium content. 91-114,118 
Potato— 
plant juices, osmotic pressure. 245-256 
tuber moth, importance similarity to egg¬ 
plant leaf miner. 567,568,569 
Power, Frederick B., and Chesnut, Victor K.: 
Chemical Examination of “Chufa," the 
Tubers of Cyperus esculettius Linne. 69-75 
Powick, Wilmer C.: Compounds Developed 
in Rancid Fats, with Observations on the 
Mechanism of Their Formation. \... 323-362 
Preparation and Properties of Colloidal Arsen- _ 
ate of Lead: F. J. Brinley. 373-374 
Progeny tests and records from bud varia¬ 
tions of navel orange. 319-322 
Proto parce spp. (homworms).477-486 
Puccmia graminis tritici, Forms III and XIX, 
cytology. 571-604 
Quantitative Determination of Carotin by 
Means of the Spectrophotometer and the 
Colorimeter: F. M. Schertz...383-400 
Ragsdale, A. C. t and Turner, C. W.: The 
Minimum Milk Requirement for Calf Rais¬ 
ing. 437-446 
Rancidity studies. 323-362 
Red Stain in the Wood of Boxelder: Ernest 
E. Hubert.447-458 
Refrigeration, indoor plant, construction and 
arrangement. 184-186 
Rhizopus nigricans — 
strains, parasitic on sweet potato. 364-365 
variations.... 363-371 
spp., pectinase production and acid¬ 
ity. 369-370 
Riker, A. J.: Some Morphological Responses 
of the Host Tissue to the Crowngall Organ¬ 
ism. 425-436 
Roberts, John W.: A Budrot of the Peach 
Caused by a species of Fusarium . 507-512 
Robinson, R. H.: Action of Sodium Nitrite 
in the Soil. 1-7 
Rootrot— 
control possibility.416-417 
cotton, habits of.405-418 
peas— 
caused by Fusarium spp. and stemrot. 459-476 
development, environmental factors... 465-468 
persistence in soil, causes..469-471 
recurrence during successive years.412-414 
spread methods, and comparison with other 
Organisms.406,412-416 
udo, cause, description, and control.271-275 
Roots, plant, carbon absorption.303-3 n 
Rosette, wheat- 
control by uses of immune varieties. 269-270 
intracellular bodies associated with.605-608 
varietal resistance..... 261-270 
Rot, sweet potato, caused by Rhizopus nigri¬ 
cans . 363-365 
Rubbish on fields, burning to control false 
wireworm. 564-565 
Rudolfs, Willem: Influence of Temperature 
and Initial Weight of Seeds upon the 
Growth-Rate of Phaseolus vulgaris Seed¬ 
lings. 537-539 
Runner, G. A., and Bliss, C. L: The Three- 
Banded Grape Leafhopper and Other 
Leafhoppers Injuring Grapes.419*424 
Rush nut. 69-75 
Rusts— Page 
grain., biologic forms studies. 571-57* 
infection methods. 594-598 
St. George, R. A., and Wade, J. S.: Biology 
of the False Wireworm Eleodes suturalis 
Say. 547-566 
St. John’s disease, peas in Holland, records 
and cause.461-462 
Sap, plant, reaction to culture solutions. 308 
Sapsuckers, spread of red stain fungus. 455 
Sarcina lutea, destruction by chlorin, tests. 379,382 
Saunders, A. R., and Miller, Edwin C.: Some 
Observations on the Temperature of the 
Leaves of Crop Plants. 15-43 
Scald, apple- 
control by oiled wrappers, oils, waxes... 531-536 
critical periods in development. 533-536 
Schertz, F. M.: The quantitative Determina¬ 
tion of Carotin by Means of the Spectropho¬ 
tometer and the Colorimeter.383-400 
Schiff test for rancidity.324,332 
Schoening, Harry W.: A Study of the Serol¬ 
ogy, the Cerebrospinal Fluid, and the Path¬ 
ological Changes in the Spinal Cord in 
Dourine. 497-505 
Sclerotinia — 
libertiana , effect on cell walls of plants... 595,598 
sp., cause of udo disease, studies. 272-275 
Sedge oil... 77-82 
Seed, wheat, treatment for control of false 
wireworm, experiments. 564 
Seedlings, bean, growth-rate relation to tem¬ 
perature and weight of seeds. 537-539 
Seeds— 
bean, weight and temperature effect on 
growth of seedlings. 537-539 
spurge nettle, description and chemical 
analysis. 259-260 
Septicemia- 
cutworm. 487-496 
homworm..477-486 
Serum, tests for dourine. 498-499 
Shade, effect on osmotic pressure in plant 
juices. 252,253,255 
Shade trees, protection from red stain fungus 455-456 
Shamel, A. D., Pomeroy, C. S., and Caryl, 
R. E.: Bud Selection as Related to Quantity 
Production in the Washington Navel 
Orange.319-322 
Sheep- 
feeding cottonseed meal experiments. 10 
poisoning with gossypol. 236 
Silkworm— 
cutworm septicemia in. 488,490,495 
hookworm septicemia in. 482-485 
Simmons, Perez, and Larson, A. O.: Notes on 
the Biology of the Four-spotted Bean 
Weevil, Bruckus guadrimaculatus Fab... 609-616 
Smith, C. M.: Excretions from Leaves as a 
Factor in Arsenical Injury to Plants. 191-194 
Snyder, Thomas Elliott, and Dietz, H. F.: 
Biological Notes on the Termites of the 
Canal Zone and Adjoining Parts of the 
Republic of Panama. 279-302 
Sodium- 
hypochlorite, action as germicide for milk 376-381 
nitrate, solutions, effect on potassium 
absorption. 309 
nitrite, action in the soil. 1-7 
soil losses of by weathering. 115 
Soil Reaction in Relation to Calcium Adsorp¬ 
tion: C. O. Swanson. 83-123 
Soils, acidity and alkalinity, methods of 
measurement.82-114 
origin, causes, measurements.83-119 
classifying by auxotaxic curve. 11-13 
conditions— 
effect on rootrot of cotton and alfalfa... 409-411 
relation to persistence of Fusarium 
martii .469-471 
sodium nitrite action. 1-7 
swelling, auxotaxic curve, means of classify¬ 
ing and studying. 11-13 
temperature— 
relation to wheat infection by Helmin- 
thosporium sativum . 195-218 
relation to rootrot of peas. 465-468 
treatment for control of false wireworm.... 564 
Some Factors Which Influence the Feather¬ 
ing of Cream in Coffee: L. H. Burgwald. 541-546 
