554 
Journal of Agricultural Research 
Vol. VII 
Page 
Pkytelephas macrocar pa, meal of the seed of— 
calorific value of. 305 
digestion experiments with. 306-311 
feeding experiments with. 311-318 
Pineapple. See Ananas sativus. 
Pisum sativum, host plant of Thielavia bast - 
cola . 
Plenodomus destruens, growth of, in concen¬ 
trated solutions.. 
Plum. See Prunus spp. 
Poa compressa, food plant of Macrosiphum 
granarium . 
Poa pratensis, food plant of Macrosiphum 
granarium . 
Popenoe, W., and Harris, J. A. (paper): Freez¬ 
ing-Point lowering of the Leaf Sap of the 
Horticultural Varieties of Persea ameri- 
cana..... 261-268 
Poplar, Carolina. See Populus deltoides. 
Populus deltoides, host plant of Aphis populi- 
foliae . 92“93 
Portulaca oleracea, host plant of Thielavia 
basicola . 
Potato. See Solanum tuberosum. 
Potato beetle. See Lepiinotarsa decemlineata. 
Prunus spp., host plants of Laspeyresia mo- 
lesta . 
Quaintance, A L., and Wood, W. B. (paper): 
Laspeyresia molesta, an Important New 
Insect Enemy of the Peach. 373-378 
Radish. See Raphanus sativus. 
Raphanus sativus, transpiration in abscised 
leaves of. 530-536 
Relation Between the Wetting Power and 
Efficiency of Nicotine-Sulphate and Fish- 
Oil-Soap Sprays (paper).389-399 
Rhizopus nigricans, growth of, in concentrated 
solution. 257 
Rice. See Oryza saliva. 
Ricinus communis, transpiration in abscised 
leaves of. 530-536 
Ridgway, C. S. (paper): Grain of the Tobacco 
Leaf. 269-288 
Roach. See Periplaneta americana. 
Robinia pseudoacacia, host plant of Thielavia 
basicola . 294 
Robinson, J, S., and Harris, F. S. (paper): 
Factors Affecting the Evaporation of Mois¬ 
ture from the Soil.439-461 
Rosenbaum, J., Schultz, E. S., and Melhus, 
I. E. (paper): Spongospora subterranea and 
Phoma tuberosa of the Irish Potato. 213-254 
Rosy Apple Aphis (paper). 321-344 
294 
375 
293 
255 
465 
465 
Schultz, E. S., Melhus, I. E., and Rosen¬ 
baum, J. (paper): Spongospora subterranea 
and Phoma tuberosa of the Irish Potato.. 213-254 
Sclerotinia cinerea, growth of, in concentrated 
solution... 257 
Sclotis chinensis, host plant of Thielavia basi¬ 
cola . 294 
Scorzonera htspanica , host plant of Thielavia 
basicola ..... 293 
Page 
Senecio elegans, host plant of Thielavia basi¬ 
cola . 293 
Shantz, H. L., and Briggs, L. J. (paper): 
Daily Transpiration During the Normal 
Growth Period and Its Correlation with 
the Weather. 155-212 
Sharp, L. T., and Hoagland, D. R. (paper): 
Acidity and Adsorption in Soils as Meas- 
■ ured by the Hydrogen Electrode. 123-145 
Siphonophora — 
cerealis , syn. Macrosiphum granarium. 
granaria, syn, Macrosiphum granarium. 
Smith, L. B. (paper): Relationship Between 
the Wetting Power and Efficiency of Nico¬ 
tine-Sulphate and Fish-Oil-Soap Sprays.. 389-399 
Sodium- 
carbonate— 
effect of— 
on absorption of nutrients by seedlings 
of Triticum vulgare ... 415 
on composition and weight of seedlings 
of Triticum sp.410-412 
chlorid— 
effect of— 
in solutions, on plant food of Triticum 
vulgare . 408-409 
on absorption of nutrients by seedlings 
of Triticum sp.413-414 
salts in water cultures, effect of, on the ab¬ 
sorption of plant food by wheat seed¬ 
lings. 407-416 
sulphate- 
effect of— 
in solutions, on plant food in Triticum 
vulgare . 409-410 
on absorption of nutrients by seedlings 
of Triticum vulgare . 414 
Soil- 
acidity and adsorption in, as measured by 
the hydrogen electrode. 123-145 
adsorption of OH ions by. 133-143 
comparative nitrification in. 72-76 
comparison of the nitrifying powers of 
humid and arid. 47-82 
effect of grinding, on the hydrogen-ion con¬ 
centration of their suspension. 129-130 
evaporation of moisture from— 
effect of— 
compacting the soil on. 456-457 
humidity on. 447-449 
method of applying water on.457-458 
mulches on. 454-455 
size of soil particles on. 453-454 
soluble salts on . 458-459 
sunshine on.45<>"453 
wind velocity on. 449-450 
experiments on nitrification in, in Cali¬ 
fornia. 55-72 
factors affecting the evaporation of moisture 
from. 439-461 
from various States, comparison of nitri¬ 
fication in. 50-55 
hygroscopic coefficients of, two indirect 
methods for the determination of.. 345-359 
