Oct. 4, 1915-Mar. 27, 1916 
Index 
1199 
Page 
Histological Relations of Sugar-Beet Seedlings 
and Phoma betae (paper). 55-58 
Honeycomb heartrot— 
character of, in Quercus alba .422-424 
control of. 428 
distribution of.427-428 
resemblance of, to other rots. 424-425 
Honeycomb Heartrot of Oaks Caused by 
Stereum subpileatum (paper)..421-428 
Hordeum — 
sp., occurrence of manganese in. 353 
spp — 
effect of alkali salts on growth of... 23ff 
resistance of, to alkali. 22-24 
vulgare — 
effect of sulphur on growth of. 245 
test of inoculation with Puccinia phleipra- 
lensis . 211-212 
Hourly Transpiration Rate on Clear Days as 
Determined by Cyclic Environmental 
Factors (paper). 583-650 
Houston, D. F., Announcement of Weekly 
Publication. i 
Hubbard, P. f and Jackson, F. H., jr. (paper), 
Relation Between the Properties of Hard¬ 
ness and Toughness of Road-Building 
Rock... 903-907 
Hubbard, P., and Pritchard, F. P. (paper), 
Effect of Controllable Variables upon the 
Penetration Test for Asphalts and Asphalt 
Cements. 805-818 
Hubert, E. E., and Weir, J. R. (paper), A 
Serious Disease in Forest Nurseries Caused 
by Peridermium filamentosum. 781-785 
Humidity, relationship of, to insect develop¬ 
ment. 1183-1191 
Humus— 
of arid soils, nitrogen content of.909-916 
relation of, to nitrogen in California soils.. 914-915 
Page 
Ionactis linariifolius , host plant of Comandra 
umbellata . 134 
Ipomoea batatas — 
analyses of. S45“557 
carbohydrate transformations in. 543-560 
host plant of Monilochaetes infuscans _ 787-791, 
995-1002 
respiration experiments with. 509-517 
scurf of. 787-791 
storage experiments with. 997 
variations in composition of. 510-516 
Irrigation— 
canal, experiments in use of current meters 
in. 217-232 
effect of, on arsenic in soil.,.460-461 
weir, a new. 1127-1136 
Jackson, F. H., Jr., and Hubbard, P. (paper). 
Relation Between the Properties of Hard¬ 
ness and Toughness of Road-Building 
Rock. 903-907 
Jackson, H. S. (paper), An Asiatic Species of 
Gymnosporangium Established in Ore¬ 
gon. 1003-1010 
Jelly-end rot, caused by Fusarium radicicola . 194-195 
Jensen, L., and Stakman, E. C. (paper), In¬ 
fection Experiments with Timothy Rust. 211-216 
Johnson, P. M., and Ballinger, A. M. (paper), 
Life-History Studies of the Colorado Potato 
Beetle. 917-926 
Juniperus chinensis, host plant of Gymno- 
sporangium Haraeanum . 1005 
Kamani nut. See Terminalia cataPPa. 
Katydid, agency in dissemination of Cerco- 
spora per sonata . 898; 900 
Koch, George P. (paper), Activity of Soil 
Protozoa.477-488 
Kopeloff, N., Dint, H., and Coleman, D. A. 
(paper), Separation of Soil Protozoa. 137-140 
Identity of Eriosoma pyri (paper). 1115-1119 
Improved Respiration Calorimeter for Use in 
Experiments with Man, An (paper).299-348 
Inactivity, zone of, in insect develop¬ 
ment. 1189-1190 
Infection by Cercospora beticola, relation of 
stomatal movement to. 1011-1038 
Infection Experiments with Timothy Rust 
(paper). 211-216 
Influence of Growth of Cowpeas upon Some 
Physical, Chemical, and Biological Proper¬ 
ties of Soil (paper). 439-448 
Inheritance of Fertility in Swine (paper). 1145-1160 
Inheritance of Length of Pod in Certain 
Crosses (paper).405-420 
Insect- 
agency in dissemination of Cercospora per- 
sonata . 897-901 
development— 
climatic relations in... i. 1184-1185 
relationships of temperature and humid¬ 
ity to. 1173-1181 
nomenclature of climatic effects on lif e of... 1190- 
1191 
zone of inactivity in development of... 1189-1190 
Invertase in apple flesh, results of tests for.. 109-111 
Lactuca saliva , absorption of boron by.879-882 
Lady beetle. See Megilla maculata. 
Langworthy, H. V., and Giltner, W. (paper). 
Some Factors Influencing the Longevity of 
Soil Micro-organisms Subjected to Desicca¬ 
tion, with Special Reference to Soil Solu¬ 
tion. 927-942 
Laphygma frugiperda , periods of activity of... 1189 
Leaf— 
hopper, carrier of Cercospora Per sonata. .. 898,900 
maturity, definition of.. 1011 
miner, sawfly. See Profenusa collaris. 
Leafspot— 
angular, of Cucumis saltvus .465-476 
inj'ury to Arackis kypogaea . 894-895 
occurrence on— 
Arachis kypogaea . 891-902 
Beta vulgaris . 1011 
Le Clair, C. A. (paper). Influence of Growth of 
Cowpeas upon Some Physical, Chemical, 
and Biological Properties of Soil.439-448 
Lepidium virginicum — 
host plant of— 
Cystopus candidus . 67 
Peronospora parastica . 60-63,67 
