1920] 



INDEX OF SUBJECTS. 



959 



Ilay — Continued. 



moal. digestion ooofflcicnt, 266. 



prices, fluctuations, U.S.D.A., 794. 



stacl£s, measurement, 290. 



(See also Meadows, Gras.s, and Alalfa. 

 Clover, Timothy, etc.) 

 Hazel wood, water conductivity, 31. 

 Hazelnut scale, notes, 252. 

 Heat, effi-ct on critical periods of plant 

 g:rowth, 207. 



{Sec also Temperature.) 

 Heather, effect on pine forest, 24. 

 Heating system, hot water, design, 486. 

 Hedges for Nebraska, list, 240. 

 Hegari, yields, Ariz., 733. 

 Heifers — 



feed cost of raising, Can., 777. 



pasturing experiments, Minn., 671. 



protein requirements, Mo., 776. 



(See also Cows.) 

 lleliophila — 



albilinea. (See Army worm, wheat- 

 head.) 



spp. (See Army worms.) 

 neliothis obsolcta. (See Cotton bollworm.) 

 Heliothrips, hcemorrhoidalis. (Sec Green- 

 house thrips.) 

 Ilelminthospdrium spp., notes, 45, 445, 446. 

 Hemileia vastatrix, notes, 445. 

 Hemlock, budworm attacking, 852. 

 Hemoglobin of blood as affected by muscu- 

 lar work, 265. 

 Hemoglobinuria of cattle, immunization, 



687. 

 Hemorrhagic septicemia. (See Septicemia.) 

 Hemp — 



analyses, 617. 



culture, 638. 



culture e.xperiments, Ky., 332. 



Manila, culture and uses, 826. 



marketing. Ky., 334. 



sunn, analyses, 829. 



(See also Sisal.) 

 Henequen. analyses, 829. 

 Hens — 



culling, Utah, 872. 



egg production and broodiness, N.J., 

 173. 



feed consumption per dozen eggs, 674. 



laying, egg-weight studies, R.I., 674. 



laying, egg yield in relation to protein 

 of feed, Ky., 871. 



laying, feeding experiments, Idaho, 269. 



laying, selection, Nebr., 776. 



(See also Egg production.) 

 Heptitols, optical properties, 801. 

 Hereditary factors, arrangement of, 268. 

 Heredity — 



factorial values, tabulation, 668. 



in beans, 818. 



in Campanula carpatica, 632. 



in cattle. 375, 669, 672. 



in com, 529. 



in 0Enothera,729, 818. 



in peaches, 540. 



in petunia, 222. 



in pigeons, 67. 



Heredity — Continued. 



in poultry, N.Y.Cornell, 872. 



in shepherd's purse, 434. 



In swine, Iowa, 71. 



in trout, 866. 



in variegated plants. 433. 



in wheat, S.Dak.. 235. 



of albinism in cereals, 132. 



of color. (^Jee Color inheritance.) 



of congenital cataract in cattle, 669. 



of defect of hair and teeth in cattle, 

 672. 



of doubleness in Begonia, 632. 



of egg-weight, R.I., 674. 



of eye color in birds, 866. 



of immunity to rinderpest, 583. 



of milk yield. Me., 175. 



of smut resistance in wheat. Wash., 

 737. 



of .susceptibility to parasites, 841. 



pure line hypothesis, 222. 



treatise, 632. 



(See also Linkage, Mutation, Selec- 

 tion, and Variation.) 

 Herrings, for sardines, chemical studies, 



111. 

 Hessian fly — 



life history, Ind., 352, 661. 



summary of information, U.S.D.A., 55. 

 Ileterakis papulosa — 



notes, 5S6. 



rOlo in turkey blackhead, 475. 

 Eeterodera radiricola — 



control, 659. 



on tobacco, 52, 246. 



on tomatoes, control, 47. 



parasitism of, 350. 

 Heterosporium — 



graHle on freesia, 243. 



pJilei n. sp., description, 752. 

 Heterozygous, substitute for term, 867. 

 Hevea irasiliensis. (See Rubber.) 

 Hewitt, C. G., writings of, 440. 

 Hickories, time for transplanting, Mo., 142. 

 Hides- 

 disinfection, 180. 

 -market for, U.S.D.A., 595. 

 Highway — 



research, national program for 

 U.S.D.A., 387. 



situation in United States, U.S.D.A., 

 186. 



transportation, theory, 790. 



(See Roads.) 

 ffippodamia spp., notes, U.S.D.A., 455. 

 ni<itomonas (n. g.) meleagridis, studies, 



476. 

 Hog cholera — 



hncilli in man, 685. 



bacteriological study, Ind., 3S5. 



blood, bacteria in, 884. 



control, 272, 780, 787; U.S.D.A., 474. 



diagnosis, 780. 



immunity, duration, 184. 



losses, U.^'.D.A., 471. 



serum, cause of failure, 278. 



serum production, Ind., 385. 



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