Oct. 2-Dec. 26, 1916 
Index 
555 
Soil—Continued. Page 
reactions, relation of equilibria to. 127-128 
semiarid, nitrification in.417-437 
effect of neutral salts on the H-ion con¬ 
centration of.■. 132-133 
hydrogen-ion concentration of. 12 5-12 7 
used in adsorption and acidity experiments, 
description of. 125 
Solatium — 
carolinense, host plant of Thielavia basicola .. 294 
melongena, transpiration in abscised leaves 
of. 53 < 5 ~ 539>544 
spp., host plants of Spongospora sub- 
terranea . 221-323 
tuberosum — 
host plant of— 
Myzus persicae .. 95 
Spongospora subterranea . 213-254 
Some Effects of the Blackrot Fungus, Sphae- 
ropsis malorum, upon the Chemical Com¬ 
position of the Apple (paper). 17-40 
Soybean. See Glycine hispida. 
Species, new. 251,373-374 
Specific Mosaic Disease in Nicotiana viscosum 
Distinct from the Mosaic Disease of Tobacco 
(paper)... 481-486 
Sphaeronema fimbriatum, growth of, in con¬ 
centrated solution. 257 
Sphaeropsis malorum — 
analyses of tissues affected with. 34-3 2. 
changes produced by, on Malus sp. in 
artificial culture.32-34 
growth of, in concentrated solution. 357 
methods of analysis of tissues affected with. 18-34 
some effects of, upon the chemical com¬ 
position of Malus sylvestris . 17-40 
Spongospora subterranea and* Phoma tube- 
rosa on the Irish Potato (paper). 2x3-254 
Spongospora subterranea — 
control measures taken with. 228r-24o 
distribution of, in the United States. 213-217 
dryrot associated with...:. 240-251 
histology of the galls of. 223-224 
host plants of... 221-233 
on the tuber of Solanum tuberosum .. — 224-226 
prevalence and period of existence of, in the 
United States. 2x7-218 
susceptibility of roots, stolons, and stems of 
Solanum tuberosum tek. 219-221 
symptoms of. 244-246 
Spray- 
contact, formulae for, tested. 391-392 
fish-oil soap, relationship between wetting 
power and efficiency of. 389-399 
methods of determining the wetting power 
and efficiency of. 390-391 
nicotine-sulphate, relationship between the 
wetting power and efficiency of. 389-399 
Slropkostyles helvola, host plant of Tkielavia 
basicola . 394 
suspensions— 
Syntherisma sanguinale, food plant of Macrosi- 
phum granarium . 466 
Syntomaspis druparum, the Apple-Seed Chal- 
cid(paper). 487-502 
Syntomaspis druparum — Page 
control of. 500-501 
description of adult of. 487 
distribution in the United States. 487 
economic importance of. 500 
effect of, upon fruit. 488-489 
fruits attacked by. 489^-491 
life history of. 491-500 
Tepkosia Virginia, host plant of Tkielavia 
basicola . 294 
Tkielavia basicola, host plants of. 289-300 
Thom, C., and Currie, J. N. (paper): Aspergil¬ 
lus niger Group. x-15 
Thyridopteryx epkemeraeformis, effect of nico¬ 
tine sulphate on. 94 
Tobacco. See Nicotiana tabacum. 
Tomato. See Lycopersicon esculentum. 
Transpiration- 
daily— 
correlation of, with weather and evapora¬ 
tion. 204-310 
during the normal growth period and its 
correlation with the weather. 155-212 
comparison of energy received and dissi¬ 
pated in. 185-187 
from abscised leaves and from potted plants, 
influence of Bordeaux mixture on the 
rates of. 529-548 
measurements of plants. 156-173 
of different crops, comparison of. 174 
period, maximum loss of water during... 178-185 
relation of, to the weather. 187-304 
water loss during periods of. 174-177 
Trifolium— 
hybridum, host plant of Tkielavia basicola ... 293 
incarnatum — 
host plant of Tkielavia basicola . 294 
See also Hay, red-clover. 
pratense, host plant of Tkielavia basicola ,... 293 
repens, host plant of Tkielavia basicola . 293 
Trigonella — 
coerulea , host plant of Tkielavia basicola — 293 
foenum-graecum, host plant of Tkielavia 
basicola . 294 
Triticum vulgare — 
effect of salts on absorption of nutrients by 407-416 
seedlings of— 
determination of plant-food absorption 
by. . — 407-408 
effect of sodium salts in water cultures on 
the absorption of plant food by.407-416 
Tropaeolus majus, host plant of A pkis spp... 95 
Turner, W. F„ and Baker, A.C. (paper): Rosy 
Apple Aphis. 321-344 
Ulex euroPaeus, host plant of Tkielavia basicola 294 
Urbahns, T. D. (paper): Life History of Hab- 
rocytus medicaginis, a Recently Described 
Parasite of the Chalcis Fly in Alfalfa Seed. 147-154 
Use of Two Indirect Methods for the Determi¬ 
nation of the Hygroscopic Coefficients of 
Soils (paper). 345 - 359 - 
