Apr. 2-June 25, 1917 
Index 
43 i 
Page 
Stewart, R., Greaves, J. E., and Hirst, C. T. 
(paper): Influence of Crop, Season, and 
Water on the Bacterial Activities of the 
Soil. 293 “ 34 i 
Stomatoceras pertorvus, parasite of Pedino- 
phora gossypiella . 359 
Study of Methods of Estimation of Metabolic 
Nitrogen, A (paper). 405-411 
Sun— 
heat of— 
effect on leucocytes. 174-175 
effect on temperature of normal pigs. 167-183 
radiation intensity, measurement by at- 
mometer. 289-290 
Temperature— 
body— 
effect of heat of sun on. 1 75-177 
effect of muscular exercise on. 175-177 
effect on fixation of ammonia by soils_ 147-148 
effect on nitrifying power of semiarid soils. 200-204 
relation to liroid solubility of benzene com¬ 
pounds. 377-378 
relation to toxicity of benzene compound^. 377 
Time, effecton fixation of ammonia by soils. 147-148 
Timothy. See Phleum pratense. 
Toxicity of Various Benzene Derivatives to 
Insects (paper). 371-381 
Trembles— 
cause. 397-404 
symptoms. 399-400 
Transpiration rate of Medicago saliva — 
comparison with evaporation rate of atmom- 
eters. 277-291 
comparison with evaporation rate of water 277-291 
influence of solar-radiation intensity on_ 284 
influence of wind velocity on. 284 
Trilicum spp., host plants of Cerodonta femo- 
ralis . 17-25 
Venturi Flume, The (paper). 115-12 9 
Venturi flume. See also Flume, Venturi. 
Water— 
evaporation rate, comparison with transpi¬ 
ration rate of Medicago saliva . 277-291 
influence on— 
ammonifying power of soil. 321-33 7 
nitric nitrogen of soil. 306-337 
nitrifying powers of soil. 321-337 
soil bacteria. 321-337 
retention by soil, relation to hygroscopic 
coefficient. 27-71 
Page 
Weather, influence on transpiration rate of 
Medicago saliva . 277-281 
Weir, with submerged rectangular orifices— 
computation of discharges. 110-113 
construction. 99-102 
formula. 109-113 
influence of arrangement on flow. 105-106 
influence of size of box on flow. 105-106 
standardization. 102-109 
Wheat. See Trilicum spp. 
Wheat-Sheath Miner (paper)... 17-25 
Wheat-sheath miner. See also Cerodonta 
femoralis. 
Wind, influence of velocity on transpiration of 
Medicago saliva . 284 
Wolf, F. A., and Curtis, R. S. (paper): Eu- 
patorium ageratoides, the Cause of Trem¬ 
bles. 397-404 
Wolf, F. A., and Cromwell, R. O. (paper): 
Xylaria Rootrot of Apple. 269-276 
Xylaria — 
hypoxylon, association with rootrot of Malus 
sylvestris . 274 
polymorpha, association with rootrot of 
Mcdus sylvestris . 274 
spp., causal organisms*of rootrot of Malus 
sylvestris . 273-274 
Xylaria Rootrot of Apple (paper). 269-276 
Zea — 
mays , growth in nutrient solution. 76-77 
ramosa — 
description. 385-386 
origin. 383 
X Zea tunicaia — 
cauliflower inflorescence in hybrid of. 393-395 
correlations between inflorescences of 
hybrid of.391-393 
description of hybrid of.38S-389 
gametic composition of hybrid of. .. 389-391 
hybrids of.383-395 
variations. 386-388 
tunicaia — 
description. 383-396 
origin. 383 
X Zea ramosa — 
cauliflower inflorescence in hybrid of. 393-395 
. correlations between inflorescences of 
hybrid of. 391-393 
description of hybrid of.388-389 
gametic composition of hybrid of.. .. 389-391 
hybrids of. 383-395 
variations.386-388 
O 
