428 
Journal of Agricultural Research 
Vol. IX 
Page 
Chalets obscurata, parasite of Pectinophora gos- 
sypiella . 359 
Chelonus blackburnii, parasite of Pectinophora 
Qossypiella . 359 
Citrus — 
aurantium — 
host plant of Bacterium citrarefaciens . 2 
composition of leaves at various stages of 
mottling. 157-166 
blast— 
description. 1-2 
distribution. 2 
economic importance. 7 
decuman a — 
composition of leaves at various stages of 
mottling. 163 
limonum — 
composition of leaves at various stages of 
mottling. 160 
host plant of Bacterium citrarefaciens . 2 
spp.— 
bacterial disease of. 1-8 
relation of distribution of soil nitrogen to 
nutrition of. 183-232 
relation of transformation of soil nitrogen 
to nutrition of. 183-252 
Coefficient, hygroscopic, relation to water-re¬ 
taining capacity of soil. 27-71 
Collins, G. N. (paper): Hybrids of Zea ramosa 
and Zea tunicata...383*395 
Comparison of the Hourly Evaporation Rate' 
of Atmometers and Free Water Surfaces 
with the Transpiration Rate of Medicago 
sativa (paper)....277-292 
Composition of Citrus Teaves at Various 
Stages of Mottling (paper). 157-166 
Cone, V. M. (paper)— 
Flow Through Submerged Rectangular 
Orifices with Modified Contractions. 97-114 
The Venturi Flume. 115-12 9 
Corn. See Zea mays . 
Corpuscles, red blood, effect of muscular 
exercise on. 168-169,177-178 
Cotton. See Gossypium spp. 
Cotton, W. E., and Schroeder, E. C. (paper): 
Some Facts about Abortion Disease. 9-16 
Cow, abortion disease of. 9-16 
Cromwell, R. O., and Wolf, F. A. (paper): 
Xylaria Rootrot of Apple... 269-276 
Crop, influence on soil bacteria.... 296-299 
Curtis, R. S., and Wolf, F. A. (paper): Eupa- 
torium ageratoidee, the Cause of Trem¬ 
bles. 397-404 
Depressaria gossypiella. Syn. Pectinophora 
gossypiella. 
Effect of Decomposing Organic Matter on the 
Solubility of Certain Inorganic Constituents 
of the Soil (paper). 253-268 
Effects of Muscular Exercise and the Heat of 
the Sun on the Blood and Body Tempera¬ 
ture of Normal Pigs (paper). 167-182 
Errata. iv 
Eupatorium ageratoides, the Cause of Trem¬ 
bles (paper). 397-404 
Page 
Evaporation rate— 
atmometer, comparison with transpiration 
rate of Medicago sativa . 277-291 
water, comparison with transpiration rate 
of Medicago sativa . 277-291 
Exercise, muscular— 
effect on- 
body temperature of normal pigs. 167-183 
clotting time of blood. 173 
hemoglobin in the blood. 173 
leucocytes in blood. 170-172,179 
red blood corpuscles. 168-169,177-178 
specific gravity of blood. 173 
Feces, nitrogen in. 408-409 
Fertilizer, nitrogenous— 
effect on— 
ammonia in furrow-irrigated soils. 210 
nitrates in furrow-irrigated soils. 206 
Fixation of Ammonia in Soils (paper). 141-1S5 
Flow Through Submerged Rectangular Ori¬ 
fices with Modified Contractions (paper)... 97-114 
Flume, Venturi— 
rectangular, construction.. 117-119 
trapezoidal, uses. 119,126-128 
V-notch. 119,121-126 
Forbes, E. B., Mangels, C. E., and Morgan, 
D. E. (paper): A Study of Methods of Esti¬ 
mation of Metabolic Nitrogen. 405-411 
Form of Potato Disease Produced by Rhizoc- 
tonia (paper).421-426 
Fly, house. See Musca domestica. 
Geleckia gossypiella. Syn. Pectinophora gos¬ 
sypiella. 
Genus, new... 346 
Gile, P. D., and Carrero, J. O. (paper): Ab¬ 
sorption of Nutrients as Affected by the 
Number of Roots Supplied with the 
Nutrient. 73-95 
Gossypium spp., food plants of Pectinophora 
gossypiella ..358-3 59 
Grapefruit. See Citrus decumana. 
Greaves, J. E., Stewart, R., and Hirst, C. T. 
(paper): Influence of Crop, Season, and 
Water on the Bacterial Activities of the 
Soil. 293-341 
Gypsum, effect on solubility of soil minerals.. 264 
Hemoglobin, effect of muscular exercise on.. 172 
Hirst, C. T„ Greaves, J. E-, and Stewart, R. 
(paper): Influence of Crop, Season, and 
Water on the Bacterial Activities of the 
Soil. 293-341 
Housefly. See Musca domestica. 
Hybrids of Zea ramosa and Zea tunicata 
(paper). 383-395 
Hygroscopic coefficient, relation to water- 
retaining capacity of soil. 27-71 
Influence of Crop, Season, and Water on the 
Bacterial Activities of the Soil (paper)... 293-341 
Insects, toxicity of benzene derivatives to. 371-381 
iron- 
absorption by roots. 85-87 
effect of organic substances on solubility in 
soils. 264 
