Oct. 4, 1915-Mar. 27, 1916 
Index 
1203 
Page 
Pritchard, F. P., and Reeve, C. S. (paper), A 
New Penetration Needle for Use in Testing 
Bituminous Materials. 1121-1126 
Prociphilus — 
aceris, description of. 1x18 
alnifoliae, description of. 1118 
bumulae, description of. iri8 
corrugatans, description of. 1118 
fraxini-depetalae , syn. Prociphilus vena- 
fuscus . 
imbricator, description of. 1118 
Populiconduplifolius, description of. 1118 
poschingeri, description of. 1119 
pyri, description of. xn6,1118 
tessellatus, description of. 1119 
venafuscus , description of. 1119 
xylostei, description of... 1119 
Profenusa collaris — 
control of.527-528 
description of. 522-524 
distribution of. 520-522 
enemies of. 526-527 
habits of. 524-526 
injury to Prunus spp. by. 521-522 
life history of. 524-526 
parasite of— 
Crataegus spp. 519-520 
Prunus spp. 519-520 
Protease, determination of, in flesh of Malus 
sylvestris . 113-1x4 
Protozoa, soil— 
activity of.477-488 
encystment of.485-487, 
separation of... 13 7-140 
Prunus — 
Pennsylvania, host plant of GaleruceUa 
cavicoUis ... 944 
spp.— 
host plant of— 
Monilia spp. 365 
Profenusa collaris .519-520 
Sderotinia spp. 365-366 
hybrids used in experiments with brown- 
rot. 369-370 
relation of tannin content of, to resistance 
to Sclerotinia spp.389-390 
resistance of, tobrownrot.369,379-383,387 
susceptibility of, to brownrot. 387 
varietal resistance of, to brownrot.365-396 
Pseudomonas — 
campestris, effect of low temperature on.... 654 
radicicola , longevity of, under varying con¬ 
ditions. 932-940 
Puccinia— 
graminis — 
avenae , parasite of cereals and grasses.. 313,215 
hordei, parasite of grasses and cereals... 213,215 
phleipratensis, infection experiments with 211-216 
Pycnidium formation in Plenodomus fusco- 
maculans . 713-769 
Pyrus — 
communis, host plant of Roestelia koreaensis . 1005 
sinensis, host plant of Roestelia koreaen¬ 
sis . 1005-1006. 
Quercus — 
alba, character of honeycomb heartrot in. 422-424 
coccinea, host plant of Comandra umbellata .. 134 
Quercus —Continued. Page 
digitata , host plant of Comandra umbellata.. 134 
marilandica , host plant of Comandra umbel¬ 
late . 134 
nana, host plant of Comandra umbellata,... 134 
spp.— 
honeycomb heartrot of. 421-428 
host plant of— 
Peridermium spp. 783 
Polyporus spp. 421 
Stereum subpileatum .^421,427-428 
Radish. See Raphanus sativus. 
Rand, F. V. (paper). Dissemination of Bac¬ 
terial Wilt of Cucurbits. 257-260 
Ransom, B. H. (paper). Effects of Refrigera¬ 
tion upon the Larvae of Trichinella spira¬ 
lis. 819-854 
Ranunculus — 
fascicularts, host plant of Peronospora fica - 
riae . 59,64,67 
Jicaria, host plant of Peronospora ficariae ... 64,67 
Rape. See Brassica napus, 
Raphanus sativus — 
absorption of boron by. 885 
effect of sulphur on growth of. 242-243 
Record, autographic transpiration.128-130 
Reeve, C. S., and Pritchard, F. P. (paper), 
A New Penetration Needle for Use in Test¬ 
ing Bituminous Materials. 1121-1126 
Refrigeration, effect of, upon larvae of Trichi¬ 
nella spiralis . 819-854 
Relation between Certain Bacterial Activities 
in Soils and Their Crop-Producing Power 
(paper).855-869 
Relation between the Properties of Hardness 
and Toughness of Road-Building Rock 
(paper).903-907 
Relation of Green Manures to the Failure of 
Certain Seedlings (paper). 1161-1176 
Relation of Stomatal Movement to Infection 
by Cercospora beticola (paper). 1011-1038 
Relation of Sulphur Compounds to Plant 
Nutrition (paper). 233-350 
Resistance, varietal, of plums to brownrot.. 365-396 
Respiration- 
calorimeter— 
conditions affecting and measurement of 
heat in. 3x5-342 
improved.299-348 
test of accuracy of. 344-346 
chamber, construction of.302-304 
Respiration Experiments with Sweet Pota¬ 
toes (paper). 509-5x7 
Respiratory exchange in respiration chamber, 
determination of.304-314 
Rhizoctonia sp.— 
effect of, on germination. 1173-1174 
parasite of Solanum tuberosum . 186,201,202 
Rhizopus nigricans, parasite of Solanum tu¬ 
berosum.'. . 183 
Rhus copallina , host plant of Comandra um¬ 
bellata . X34 
Rice— 
polished, effect of feeding to pigs.490-492 
See also Oryza sativa. 
upland, ash composition of, at various stages 
of growth. 357 
Ricinus communis, composition of seed of... 1163 
