July 1-Dec. 15, 1925 
Index 
1209 
Pine—Continued _ 
Yellow—Continued Page 
volume computations, new meth¬ 
od.-. 1126-1127,1135 
Finns— 
monticola, methods of stimulating germi¬ 
nation of seeds_ 889-899 
ponderosa — 
studies in nursery practice..1101-1120 
yield capacities of the pure type on the 
east slope of the Sierra Nevada 
Mountains in California.-.1121-1135 
Plant- 
environment, historical data__ 585 
Tissue, Further Studies on Isoelectric 
Points: William J. Robbins and Irl T. 
Scott. 385-399 
Plants— 
Localization of Response to Relative 
Length of Day and Night: W. W. 
Gamer and H. H. Allard__ 555-666 
temperatures, interior, discussion in 
article on date palm.. 401-453 
Plum, stocks resistant to Crown gall_ 960-969 
Plymouth Rock eggs, relationship of weight 
and hatching quality_ 685-694 
Poisoning, tree, as method of killing, notes. 267 
Pokeweed— 
agency in overwintering of mosaic disease. 32-42 
mosaic of, infectious nature and symp¬ 
toms. __ 34 
susceptibility to cucumber mosaic.. 36 
Poplar, temperature, interior, observation. 448 
Pork— 
Beef, and Lamb, Vitamin A in: Ralph 
Hoagland and George C. Snider. 201-221 
curing, shrinkage. 1176-1178 
Quality, Influence of Field-pea Rations: 
J. E. Nordby and Robert S. Snyder. 1173-1178 
vitamin A in_ 211-215,220 
Potassium, percentage in corn... 188 
Potato- 
Beetle, Colorado, Fluctuation in Distri¬ 
bution: C. H. Batchelder__ 541-547 
growth following certain chemical and 
soil treatments__ 358-362 
Infection of Seed Piece by Fusarium 
oxysporum, Critical Temperature: Mac¬ 
Millan, H. G., and Meckstroth, G. A. 917-921 
infestation with Colorado beetle, influ¬ 
ence of previous crop___ 543-547 
“volunteer,” relation to spread of Colo¬ 
rado beetle.... 545-547 
Wart- 
Disinfection of Soil, Chemical and 
Steam: N. Rex Hunt, F. G. O’Don¬ 
nell, and Rush P. Marshall.. 301-363 
distribution in United States_ 302 
Potatoes- 
commercial varieties, i m munity from 
wart disease_ 301 
disease, effect on nitrogen in_ 287-288 
Potato-tuber tissue, study of isoelectric 
points- 386-389,395-398 
Powick, Wilmer C.— 
and Hoagland, Ralph: A Chemical Study 
of the Flesh of Emaciated Cattle_ 1000-1013 
Inactivation of Vitamin A by Rancid 
Fat-- 1017-1026 
Protein— 
Content— 
and Yield of Wheat, Influence of Ni¬ 
trate Nitrogen: Edmund Burke... 1189-1199 
wheat, increase. 67-70 
disintegration in germination of etiolated 
corn seed__1149-1164 
nitrogen, nonprotein, and total nitrogen, 
proportion in various etiolated corn 
seedlings. 1151-1153 
Pruning, influence on fruit-bud formation 
of pear and apricot__ 887-882 
Prunus— 
t Stocks Resistant to Crown-gall, Studies: 
Clayton O. Smith... 957-971 
[ umbellata (Black sloe), promising as a 
rootstock resistant to crown gall-.. 963-864,970 
Pseudococcus spp., descriptions_ 488-493 
Pseudomonas tumefaciens Sm. and T., con¬ 
trol as cause of crown gall.- 957 
Pumps—■ Page 
Deep-well Turbine, Tests: F. L. Bixby. 227-246 
economy of operation, remarks..._ 227-228 
turbine, deep-well, form of construction. 227 
Quinn, J. P., and Jull, M. A.: The Rela¬ 
tionship Between the Weight of Eggs 
and the Weight of Chicks According to 
Sex_ 223-226 
Ragweed, common, Ambrosia artemisiae - 
folia, host of cotton stainers... 1138 
Rainfall, western yellow pine nurseries, 
notes.. 1118 
Ramsey, G. B.: Sclerotinia Species Causing 
Decay of Vegetables Under Transit and 
Market Conditions.... 597-632 
Rands, R. D., and Brotherton, Wilbur, 
jr.: Bean Varietal Tests for Disease- 
resistance..101-154 
Rathbun-Gravatt, Annie, and Spaulding, 
Perley: Longevity of the Teliospores 
and Accompanying Uredospores of 
Cronartium ribicola Fischer in 1923_901-916 
Ration, Wheat, Effects of Sodium Varia¬ 
tion: George A. Olson and J. L. St. 
John.... 365-375 
Rations— 
Field Pea, Influence on the Quality of 
Pork: J. E. Nordby and Robert S. 
Snyder.. 1173-1178 
hogs, comparison. 1176,1177 
Rats, breeding and testing for vitamin A.. 202-218 
Red clover. See Clover. 
Respiration, effect on interior temperature 
of date-palm bud... 447,448 
Ribes spp., hosts of Cronartium ribicola, 
experiments. 905 
Rice, inoculation with Ophiobolus hetero- 
strophus, n. sp...714-716 
Rio Grande Valley, cotton stainer, prelim¬ 
inary observations. 1137-1147 
Roaches, endurance of vaeuum_ 1035 
Robbins, William J., and Scott, Irl T.: 
Further Studies on Isoelectric Points for 
Plant Tissue.. 385-399 
Robinson, R. H.: Spreaders for Spray 
Materials and the Relation of Surface 
Tension of Solutions to Their Spreading 
Qualities__ ____ . 71-81 
Rumex acetosa , chromosomes, notes_ 941 
Ruminants, digestion of alfalfa hay and 
meal.. 989,995 
Rust- 
Pine, Gallowaya pinicola Arth., Organiza¬ 
tion of the Telial Sorus: B. O. Dodge... 641-651 
See also Blister fust. 
Salmon, W. D., and Miller, Emerson R.; 
The Water-soluble Vitamin Content or 
the Velvet Bean_ 793-799 
Salt, sodium chloride, use in soil disinfec¬ 
tion_ 317 
Sand, quality for tree seed planting. 1120 
Sap, effect of currents on interior tempera¬ 
tures of plants__.... 443-445,448,452 
Schroeder, W. F., and Edelman, David: 
Composition of Marrow of Fresh and 
Cured Hams__ 1015-1016 
Schwartz, Benjamin: Effects of Feeding 
Animals With Trichinous Meat Con¬ 
taining Nonviable Trichinae.. 945-947 
Sclerotinia — 
economic importance.. 598-603 
germination studies_ 614-617 
infection studies_ 617-622 
intermedia and S. minor, morphology, 
comparison with S. libertiana _605,609,610 
morphology. 603-617 
ricini, morphology, comparison with S. 
intermedia, S. minor, and S. libertiana .. 609-610 
Species Causing Decay of Vegetables 
Under Transit and Market Conditions: 
G. B. Ramsey_ 597-632 
Scott, Irl, and Robbins, William J.: Fur¬ 
ther Studies on Isoelectric Points for 
Plant Tissue__ 385-399 
Screw Worms, Larvicide, Benzene for: 
D. C. Parman.. 885-899 
