Apr. x-Sept. i s, 1921 
Index 
881 
Page 
Hahn, Glenn G., et al. (paper): A Chlorosis 
of Conifers Corrected by Spraying with 
Ferrous Sulphate. 153-171 
Hall, Maurice C. (paper): Carbon Tetrachlo- 
rid for the Removal of Parasitic Worms, 
Especially Hookworms. 157-175 
Hardness, relation to protein content of 
wheat. 507-522 
Harlan, Harry V., and Anthony, Stephen 
(paper): Effect of Time of Irrigation on 
Kernel Development of Barley. 29-45 
Harmolita — 
atlantica, host of Dilropinolus aureoviridis . . 409 
elymicola, hopt of Dilropinolus aureoviridis. . 409 
grandis, host of Dilropinolus aureoviridis. ... 409 
secalis, host of Dilropinolus aureoviridis . 409 
tritici — 
host of Homoporus chalcidiphagus . 415-420 
parasites. 405-426 
vaginicola, host of Dilropinolus aureoviridis . 409 
Harter, L. L-, and Weimer, J. L. (paper): 
Glucose as a Source of Carbon for Certain 
Sweet Potato Storage-Rot Fungi. 189-210 
Respiration and Carbohydrate Changes 
Produced in Sweet Potatoes by Rhizopus 
tritici. 627-635 
Respiration of Sweet Potato Storage-Rot 
Fungi When Grown on a Nutrient Solu¬ 
tion. 211-226 
Studies in the Physiology of Parasitism 
with Special Reference to the Secretion 
of Pectinasc by Rhizopus tritici.609-625 
Wound-Cork Formation in the Sweet Po¬ 
tato. 637-647 
Hartley, Carl, ct al. (paper): A Chlorosis of 
Conifers Corrected by Spraying with Fer¬ 
rous Sulphate. 153-171 
Harvey, R. B., and Weiss, Freeman (paper): 
Catalase, Hydrogcm-Ion Concentration, 
and Growth in the Potato Wart Disease.. 589-592 
Headley, Frank B., and Scofield, Carl S. (pa¬ 
per): Quality of Irrigation Water in Rela¬ 
tion to Band Reclamation. 265-278 
Heart, effect of ration on development. 297-309 
Heat production of farm animals.351-362 
Helianthus annuus, host of Bacterium solana- 
cearum ... 2 $ 0 
Helminthosporium sp., isolated from potatoes. 828 
Hemileuca — 
nevadensis, host of Anaslatus semiflavidus . 383-384 
oliviae, host of Anaslatus semiflavidus .... 373-384 
Hemoglobin in blood of horses.......‘. 678-688 
Henley, R. R. (paper): A Constant-Temper¬ 
ature Bath for Heating Blood Serum_541-544 
Heritable Variations in an Apparently Uni¬ 
form Variety of Cotton (paper). 227-242 
Homoporus chalcidiphagus— 
host of Dilropinolus aureoviridis . 409 
parasite of Harmolita tritici . 405-426 
Hookworms, efficacy of carbon tetrachlorid 
against. 157-175 
Hordeum — 
spp — 
effect of time of irrigation on develop¬ 
ment of kernels. 
29-4S 
Page 
Hordeum— Continued. 
spp.—continued. 
relation of seed-coat injury and viability 
to susceptibility to molds and fungi¬ 
cides. 99-122 
vulgare, semipermeable membranes. 108 
Horse nettle. See Solanum carolinense. 
Horses, blood counts. 678-688 
House fly. See Musca domesfica. 
Humidity— 
effect on development of Cladosporium 
citri. 
250-252 
201-204 
707-725 
relation to growth of Penicilliutn and As¬ 
pergillus. io5 
Hunter, Charles A. (paper): Bacteriological 
and Chemical Studies of Different Kinds of 
Silage. 767-789 
Hurd, Annie May (paper): Seed-Coat Injury 
and Viability of Seeds of Wheat and Barley 
as Factors in Susceptibility to Molds and 
Fungicides. 99-122 
Hybrid, wheat-spelt, suppression of awns by 
fungus. 699-700 
Hydiate, lactose, crystals in condensed milk 793-794 
Hydrates, ammonium, in urine, effect of 
cucurbita seeds. 524-528 
Hydrogen-ion concentration- 
in potato wart disease. 589-592 
of medium, effect on growth of storage-rot 
fungi. 
of solutions, effect of growing plants. 
Hypodenna — 
bovis, larval stages. 439-457 
lineatum, larval stages. 439-457 
Hydrolaca dentipcs, dispersion by flight_ 758 -766 
Ice cream, sandy crystals. 791-796 
Impatiens balsamina, host of Bacterium solana- 
cearum . 
Indeterminate— 
rhizome in timothy. I77 
stolon in timothy. I7 g 
Irish potato. See Solanum tuberosum. 
Iron, relation to effect of ammonium sulphate 
on P lants . 701-728 
Iron-sulphate, effect on pine seedlings. I5g 
Irrigation, effect of time on development of 
barley kernels. 29-45 
Irrigation water, quality. 265-278 
Jagger, Ivan C. (paper): Bacterial Lcafspot 
Disease of Celery. 185-188 
Jeffrey pine. See Pinus jeffreyi. 
Jimson weeds. See Datura stramonium. 
Jointworm. See Harmolita tritici. 
Jones, LinusH., andShive, John W. (paper): 
Effect of Ammonium Sulphate upon Plants 
in Nutrient Solutions Supplied with Ferric 
Phosphate and Ferrous Sulphate as Sources 
of Iron . 701-728 
Juglans — 
nigra, concentration of cell sap. 83-85 
regia, concentration of cell sap. 83-85 
spp., concentration of cell sap. 83-85 
Kearney, Thomas H. (paper): Heritable Va¬ 
riations in an Apparently Uniform Variety 
ofCotton . 227-242 
