Jan. 1 , 1925-June 15, 1925 
Index 
1205 
Page 
Rutaceous Plants, Susceptibility to Attack 
by the Citrus-scab Fungus: John R. 
Winston, Walter J. Bach, and John J. 
Bowman..-.. 1087-1093 
Rye- 
amino acids and polypeptides of un¬ 
germinated kernel_ 989-994 
composition of ungerminated kernel_ 990-993 
Saccharum officinarum, Anatomy of Vegeta¬ 
tive Organs: Ernst Artschwager... 197-242 
Sauerkraut- 
Fermentation, Influence of Inoculation: 
O. R. Brunkow, W. H. Peterson, and 
E. B. Fred_ 955-960 
quality testing_ 960 
Scab— 
Apple, Development, Relation of Dis¬ 
semination of Spores of Venturia 
inaequalis: C. N. Frey and G. W. Keitt 529-540 
susceptibility of rutaceous plants- 1083-1090 
Scale Insects of the Subfamily Ortheziinae, 
Classification: Harold Morrison- 97-154 
Schedius kuvanae Howard— 
colonization___ 653-664 
description and life history_.. 645-653 
importation and distribution as moth 
parasite__ 643-675 
Schertz, F. M.— 
Some Physical and Chemical Properties 
of— 
Carotin and the Preparation of the 
Pure Pigment_ 469-474 
Xanthophyll and the Preparation of 
the Pure Pigment_ 575-585 
The Quantitative Determination of 
Xanthophyll by Means of the Spectro¬ 
photometer and the Colorimeter_ 253-261 
Schoening, Harry W.: Studies on the 
Single-injection Method of Vaccination 
as a Prophylactic against Rabies in 
Dogs_...___ 431-439 
Schultz, E. S., and Folsom, Donald: In¬ 
fection and Dissemination Experiments 
with Degeneration Diseases of Potatoes, 
Observations in 1923_ 493-528 
Schwartz, Benjamin: Ascaridia lineata, a 
Parasite of Chickens in the United 
States_ 763-772 
Season, Sowing and Planting, for Western 
Yellow Pine: W. G. Wahlenberg_ 245-251 
Seasonal Conditions, Effect upon the 
Chemical Composition of American 
Grape Juices: Joseph S. Caldwell-.. 1133-1176 
Seed- 
beet— 
increase of production by early planting 815 
Time to Plant Mother Beets for Pro¬ 
ducing: Dean A. Pack_811-815 
production by Engelmann spruce_995-1009 
tree- 
germination in second year_:- 640 
sowing for reforestation, failure... 637-641 
Western yellow pine, hold-over tendency 245- 
246,248 
Seedlings, conifer, survival in cut-over 
stands... 1004-1008 
Seeds, potato, disease spread, experiments. 521 
Sex- 
Control, Possibility, by Artificial Insem¬ 
ination with Centrifuged Sperma¬ 
tozoa: Jay L. Lush_ 893-913 
determination— 
chromosome theory and other.. 894-896 
of, references in study_912-913 
relation to gestation period length_ 904-905 
Shade, effect on reproduction of Engelmann 
spruce_ 1006 
Shear, C. L.— 
and Dodge, B. O.: Life History of Pilacre 
faginea (Fr.) B. & Br. 407-417 
The Life History of the Texas Root Rot 
Fungus Ozonium omnivorum Shear_ 475-477 
Sherbakoff, C. D., Bailey, Alice A., Johann, 
Helen, Reinking, O. A., and Wollen- 
weber, H. W.: Fundamentals for Tax¬ 
onomic Studies of Fusarium_ 833-843 
Shillinger, J. E., Cram, E. B., and Hall, 
M. C.: A Test of Raw Onions in the 
Diet as a Control Measure for Worms 
in Dogs__ !_155-159 
Page 
Sideris, Christos P.: The Role of the Hy¬ 
drogen-ion Concentration on the De¬ 
velopment of Pigment in Fusaria-1011-1019 
Simmons, Perez, and Ellington, George W.: 
The Ham Beetle, Necrobia rufipes De 
Geer_ 845-863 
Skinner, J. J., Allison, F. E., and Reid, 
F. R.: Toxicity Studies with Dicyan- 
odiamideon Plants.. 419-429 
Smith, Bradford B.: Relation between 
Weather Conditions and Yield of 
Cotton in Louisiana. 1083-1086 
Smut, Maize, Study of Life History and 
Ecologic Relations: Alden A. Potter 
and Leo E. Melchers_ 161-173 
Smuts, Oat, Relative Susceptibility of Se¬ 
lections from a Fulghum-Swedish 
Select Cross: George M. Reed and 
T. R. Stanton_ 375-391 
Softwoods, mortality, from budworm at¬ 
tacks, relation to previous growth_ 541-555 
Soil- 
moisture, references to publications and 
review. 819-820,831 
need of sulphur for plant growth... 937-938 
Palouse Silt Loam, Effect of Sulphur and 
Gypsum on the Fertility Elements: 
Lewis W. Erdman_ 451-462 
poisoning, cause of yield decrease in con¬ 
tinuance of one crop.. 1095-1097 
sulphur, content, relation to alfalfa pro¬ 
duction.. 937-947 
Soils— 
Moisture Absorption and Retention, In¬ 
fluence of Soil Mulch: M. A. McCall- 819-831 
Occurrence of Copper, Manganese, Zinc, 
Nickel, and Cobalt, and Their Possible 
Function as Vital Factors: J. S. Mo- 
Hargue.. 193-194 
survey and analyses-- 1099-110C 
Solarium tuberosum L. See Potatoes. 
Solubility, factor in effectiveness of worm 
destroyers_ 949 
Soy Bean Radicicola, Adaptation to a 
Specific Host Variety: Alfred T. 
Perkins_ 243-244 
Soy beans, Virginia, Effect of Bacterial 
Numbers on Nodulation: Alfred T. 
Perkins. 95-96 
Spar hawk, W. N.: The Use of Liability 
Ratings in Planning Forest Fire Pro¬ 
tection_ 693-762 
Spectrophotometer, use in quantitative 
determination of xanthophyll _. 253-254,257-259 
Spermatozoa, vitality-- 901 
Spikelet, oat, morphology discussion. 18-22, 
28-34,47-55 
Spindle tuber, symptoms and injury to 
potatoes.. 494 
Spore forms, sequence in Puccinia podo - 
phylli . 72-75 
Spores— 
Ribes, wintering in Pacific Northwest_ 605 
Venturia inaequalis , Relation of Dissem¬ 
ination to Apple Scab development: 
C. N. Frey and G.W. Keitt_ 529-540 
Spot blotch, barley. See Helmmthosporium 
sativum. 
Spraying, use for control of corn smut. 170 
Spruce— 
budworm— 
epidemics, danger to softwood forests... 553 
injuries by, relation of mortality of trees 
to previous growth_ 541-555 
Engelmann— 
germination and survival in different 
surfaces_ 1008 
Reproduction, Factors Affecting: W. 
C.Lowdermilk. 995-1009 
reproduction suggestions_ 1009 
stand, effect of elevation on.. 996,1001,1004-1006 
Stanton, T. R.— 
and Coffman, F. A.: Variation in the 
Kherson Oat at Akron, Colorado- 1063-1082 
and Reed, George M.: Relative Suscepti¬ 
bility of Selections from a Fulghum- 
Swedish Select Cross to the Smuts of 
Oats. 375-391 
Stony soil, cause of failure of reforestation... 640 
