July 1-Dec. 15, 1925 
Index 
1211 
Page 
Sorus, Telial, Organization in the Pine 
Rust, Oallowaya pinicola Arth.: B. O. 
Dodge.... 641-651 
Sowing, broadcast and with drills, western 
yellow-pine seed.1103,1110,1120 
Soy beans, study of isoelectric points_ 389-390, 
395-398 
Spaulding, Perley, and Rathbun-Gravatt, 
Annie: Longevity of the Teliospores 
and Accompanying Uredospores of 
Cromrtium ribicola Fischer in 1923. 901-916 
Spinach, effect of disease on nitrogen in- 288 
Spores, leaf spot, difference from leaf-blight 
spores.. 704 
Spot, bacterial. See Bacterial spot. 
Spray- 
Materials, Spreaders for, and the Rela¬ 
tions of Surface Tension of Solutions to 
Their Spreading Qualities: R. H. Rob¬ 
inson.. 71-81 
spreading, publications used in study.... 81 
Spraying— 
effectiveness against potato beetles- 545-547 
emulsions for— 
and their making. 59-65 
directions-.. 61-65 
Spreading properties, many substances- 75 
Squash, infection with mosaic. 5 
Squirrels, Ground, Observations on the 
Hibernation of: William T. Shaw.761-769 
St. John, J. L., and Olson, George A.: The 
Nutritive Value of Wheat: I.—Effect of 
Variation of Sodium in a Wheat Ration. 365-375 
Stainer, cotton. See Dysdercus obscuratus 
Distant. 
Starch, presence in date palm... 430 
Sterilization- 
soil by steam... 318-329 
vibrator..... 502-504 
Sterilizing, methods... 191-194 
Stevens, J. W,: Value of Litmus, Brom- 
Cresol Purple, and Janus-Green Milk 
in a Study of the Nodule Organisms 
of Leguminosae. 997-1000 
Stoneberg, Hugo F., and Kyle, Curtis H.: 
Associations Between Number of Ker¬ 
nel Rows, Productiveness, and Dele¬ 
terious Characters in Corn... 83-99 
Storage, effect on eggs.161-163 
Student’s method- 
application, suggestion. 955 
Limitation When Applied to Fertilizer 
Experiments: W. W. Weir... 949-956 
Sugar¬ 
cane, inoculation with Ophiobolus hetero- 
strophus, n. sp.714-716 
pine ( Pinus lambertiana ), note.. 1121 
Sulphate content— 
. comparison of Egyptian, Sea-Island, and 
Upland cotton. 1027-1033 
Leaf-tissue Fluids of Egyptian and Up- 
* land Cotton: J. Arthur Harris, Clara 
T. Hoffman, and Walter F. Hoffman.. 653-661 
Sulphuric acid, use to prevent damping-off. 1112 
Sun and air, effect on potato-wart spores.. 318 
Sunflower- 
growth studies of, constants.. 973-985 
plants, ash..1168,1169 
Sunflowers— 
and corn, percentage composition and 
pounds of elements removed by crops, 
comparison_ 1170 
Mineral Composition When Grown for 
Silage: Ray E. Neidig and Robert S. 
Snyder___1165-1171 
Sunlight, Direct, Effect on Growth of Date 
Palm: Silas C. Mason—. 455-468 
Surface tension- 
many substances, tables. 74 
of Solutions, Relation to Spreading Qual¬ 
ities in Spreaders for Spray Materials: 
R. H. Robinson.. 71-81 
Sweet Clover, White, Difference in Inter¬ 
node Lengths Between, and Effect of 
Light Duration Upon Seedlings: A. J. 
Pieters_ 585-596 
Page 
Synchytrium endobioticum (Schild.) Perc., 
eradication from infected soil by steam 
and chemical soil disinfection. 301-363 
Take-All Disease of Wheat— 
morphology of causal fungus. .. 803-806 
Studies with Ophiobolus graminis Sacc.: 
Ray J. Davis... 801-825 
Tankage, use in combinations for finishing 
hogs, comparison. 1176 
Telial Sorus in the Pine Rust Oallowaya 
pinicola Arth., Organization of: B. O. 
Dodge_ 641-651 
Teliospores and Accompanying Uredo¬ 
spores of Cronartium ribicola Fischer, 
Longevity in 1923: Perley Spaulding 
and Annie Rathbun-Gravatt—.- 901-916 
Temperature- 
changes occurring in soil under a steam 
pan in disinfection for potato-wart dis¬ 
ease_ 321-329 
Critical, for Infection of the Potato Seed 
Piece by Fusarium oxysporum: H. G. 
MacMillan and G. A. Meckstroth-917-921 
effect on Sclerotinia culture and host 
tissues.. 604-608,622-629 
influence— 
in control of growth centers of en- 
dogens__ 447-450 
of growth of Ophiobolus graminis 
Sacc.. 807-808 
Minimum, for Growth of Date Palm, 
and Absence of Resting Period (of 
Date Palm): Silas C. Mason..401-414 
Soil, and Moisture Influence on Infec¬ 
tion of Young Wheat Plants by 
Ophiobolus graminis: H. H. McKinney 
and R. J. Davis. 827-840 
study as a factor in infection of the 
potato-seed piece..917-921 
Temperatures— 
date palm, interior- 
comparison with air and soil tempera¬ 
tures_ 433-446 
discussion...— 446 - 450 
effect of sap currents .. 443-445 
effect of soil water__- 442-443,445-446 
factors governing-- 431 
interior— 
equalization in growth center by tissue 
insulation_ 446-447 
plants, discussion... 447-450 
limiting effect on date palm growing. 450-451 
Low, Effect on Bruchus obtectus , Say, an 
Insect Affecting Seed: Walter Carter.. 165-182 
soil and air, at Indio, Calif—. 441-443 
Texas— 
cotton Stainer, preliminary observa¬ 
tions...I......1137-1147 
San Antonio, experiments on date palm 
for minimum temperature of growth—. 408-410 
Thermostasy, Partial, of the Growth Cen¬ 
ter of Date Palm: Silas C. Mason.415-453 
Tobacco- 
beetle, control by heat vacuum- 1045-1036 
mosaic of, intertransmission with cucum¬ 
bers_ 49-52 
Tomato— 
Cladosporium Leaf Mold: Fruit Infec¬ 
tion and Seed Transmission: Max W. 
Gardner_519-540 
fruit infection with leaf mold, mode of— 530-534 
leaf mold fungus, remarks on.— 523-528 
seed infection with leaf mold.. 534-536 
symptoms of infection with Cladospo¬ 
rium leaf mold... 519-523 
Translocation, of the Food Materials of the 
Wheat Seedling: L. Edwin Yocum- 727-^744 
Transpiration— 
date palm, relation to interior tempera¬ 
ture—!.. 431 
foliage, effect on interior temperature— 448,450 
Trees— 
growth curves, errors possible in plotting. 923-928 
killing— 
by girdling and poisoning, experiments. 270-274 
methods, notes.. 267 
taper curves, possible errors in computing 923-928 
undesirable in forest, two kinds named.. 267 
