1196 
Journal of Agricultural Research 
Vol. V 
Comandra — Page 
livida, host plant of Peridermium pyriforme. 133 
pallida , host plant of Peridermium pyri¬ 
forme . 133 
richardsiana , host plant of Peridermium 
pyriforme . 133 
umbellata — 
host plant of Peridermium Pyriforme ... 133,289 
host plants of. 134 
parasitism of. 133-13 5 
Combination, new. 1006 
Comptonia peregrina , host plant of Comandra 
umbellata .,. 134 
Concrete roads, apparatus for measuring the 
wear of. 951-954 
Cone, V. M. (paper)— 
A New Irrigation Weir. 1127-1136 
Flow through Weir Notches with Thin 
Edges and Full Contractions.1051-1113 
Cook, F. C. (paper). Boron: Its Absorption 
and Distribution in Plants and Its Effect 
on Growth.877-890 
Cooledge, L- H. (paper), Agglutination Test 
as a Means of Studying the Presence of 
Bacterium abortus in Milk.871-875 
Coons, G. H. (paper). Factors Involved in 
the Growth and Pycnidium Formation of 
Plenodomus fuscomaculans. 713-769 
Copper sulphate, effect on Bacterium lachry- 
mans . 474“475 
Com. See Zea mays. 
Cotton- 
See Gossypium. 
wild. See Thurberia thespesioides. 
Cottonseed— 
kernels, toxicity of. 265-266,278-283 
meal- 
comparison with rice as a feed for pigs.. 490-492 
effect of, on breeding sows. 491-492 
toxic substance in. 261-288 
poisoning in pigs, relation of, to beriberi.. 489-493 
toxicity of. 261-262,283-286 
'Cowpea. See Vigna sinensis. 
Crataegus spp., host plants cf Profenusa col- 
laris . 520-521 
Cronartium — 
coleosporioides, parasite of Castitteja miniata . 781 
pyriforme , uredinial form of Peridermium 
pyriforme . 289 
Crop, effect of alkali salts in soils on germina¬ 
tion and growth of. 1-53 
Crosses, inheritance of length of pod in.405-420 
Cruciferae, effect of sulphur on. 242-245 
Cucumber. See Cucumis sativus . 
Cucumis sativus — 
angular leafspot of.465-476 
host plant of— 
Bacillus tracheiphilus . 259 
Ba cteriu m lachrymans .466-474 
Plasmopara cubensis . 259 
Cucurbit, dissemination of bacterial wilt of. 257-260 
Curcuma longa, absorption of boron by. 879 
Current meter, use of, in irrigation canals.. 217-232 
Curtis, Maynie R. (paper), Frequency of Oc¬ 
currence of Tumors in the Domestic Fowl 397-404 
Cydonia vulgaris , host plant of Roestelia 
koreaensis ...... 1005 
Page 
Cylindrosporium pomi, effect of low tempera¬ 
ture on. 652 
Cystopus candidus — 
parasite of Lepidium virginicum .62-63,67 
perennial mycelium in. 62-63,67 
Dactylis glomcrata — 
host plant of Puccmia pkleipratensis .211-215 
Danthonia compressa, host plant of Comandra 
umbellata . 134 
Diabrotica vittata, agent in spread of bacterial 
wilt. 257 
Diastase— 
in apple flesh, results of tests for. 109 
presence of, in apple juice. 108 
Dipsacus fullonum , host plant of Peronospora 
dipsaci . 59*67 
Dissemination of Bacterial Wilt of Cucurbits 
(paper). 257-260 
Distribution of the Vims of the Mosaic Dis¬ 
ease in Capsules, Filaments, Anthers, and 
Pistils of Affected Tobacco Plants (paper) 251-256 
Diuresis and Milk Flow (paper). 561-568 
Diuretics, effect of, on milk flow of goats... 561-567 
Dryrot— 
caused by— 
Fusarium eumartii . 198-201 
Fusarium radicicola . 195-196 
Edson, H. A. (paper). Histological Relations 
of Sugar-Beet Seedlings and Phoma betae.. 55-58 
Effect of Alkali Salts in Soils on the Germina¬ 
tion and Growth of Crops (paper). 1-53 
Effect of Cold-Storage Temperatures upon the 
Mediterranean Fmit Fly (paper).. 657-666 
Effect of Controllable Variables upon the 
Penetration Test for Asphalts and Asphalt 
Cement (paper). 805-818 
Effect of Elemental Sulphur and of Calcium 
Sulphate on Certain of the Higher and 
Dower Forms of Plant Life (paper). 771-780 
Effect of Natural Low Temperature on Cer¬ 
tain Fungi and Bacteria (paper).651-655 
Effect of Refrigeration upon the Larvae of 
Trichinella spiralis (paper). 819-854 
Effect of Temperature on Movement of Water 
Vapor and Capillary Moisture in Soils (pa¬ 
per). 141-172 
Egg production of domestic fowl, measure¬ 
ment of winter cycle in. 429-437 
Elymus — 
canadensis , host plant of Puccmia graminis 
avenae . 215 
robustus, host plant of Puccinia graminis 
avenae . 215 
virginicus , host plant of Puccinia phleipra » 
tensis . 212-213,215 
Emmer. See Triticum dicoccum. 
Emulsin, determination of, in flesh of Malus 
sytvestris . in 
Endoparasite, caudal vesicle of. 504-506 
Environment— 
hourly transpiration rate on clear days as 
determined by. 583-650 
relation of, to transpiration of plants-637-646 
