1919] 



INDEX OF SUBJECTS. 



951 



Egg production — 



as afiforted by app of hen, Ark., 571. 



as affected by artificial illumination, 

 N.J., 572, 869 ; Wash., 871. 



as affected by confinement, Ind., 570. 



as affected by hatching date, N.J., 75. 



egg weight as criterion, 274. 



improvement by breeding, Kans., 7G. 



in Rhode Ishuid Reds, internal fac- 

 tors, 179. 



records, errors incident to use, N.J., 75. 



records, method of indicating tijne ele- 

 ment, 870. 



relation to blood fat, 773, 774. 



relation to body measurements, 370. 



winter, relation to year's record, 370. 



(See also Hens, laying.) 

 Egg substitutes, so-called, N.Dak., 66. 

 Eggplant — 



diseases, notes, 745. 



fruit spot, notes, Fla., 543. 



rot, studies, Fla., 542. 

 Eggplants, breeding experiments, N.J., 43. 

 Eggs — 



candling, 361. 



cold storage, U.S.D.A., 66, 179. 



dehydration, 557. 



distribution to school children, 396. 



embryo mortality, N.J., 75. 



fertilization, 774, 871. 



gastric response to, 857. 



grading, handling, and packing, N.J., 

 572. 



incubation, 371 ; N.J., 77. 



methods of investigation and stand- 

 ards, 558. 



preservation, N.J., 75. 



preserved, Chinese, 858. 



prices in New York, N.J., 75. 



trolley carriers. Wash., 292. 



two-embryo, of the ring dove, 867. 



zinc content, 464. 

 Egg-yolk media, unheated, 63. 

 Eimeria sp. infecting rabbits, 784. 

 Einkorn as affected by Hessian fly, Kans., 



34. 

 Elatotrypes hoferi n.g. and n.sp., notes, 259. 

 Elder, European, 653. 

 Electric light and power from small streams, 



U.S.D.A., 690. 

 Electricity — 



for cooking, 587. 



for heating, 587. 



on the farm, 489. 

 Electrode, titration, description, 765. 

 Electrolytic apparatus, platinum substitute 



for, 204. 

 Electrometric — 



titration, 503, 711. 



titration of protein solutions. 

 N.Y.State, 201. 

 Electromotive forces, pH, H+ and OH — 



values corresponding to, 204. 

 Eleocharis spp., analyses, Wyo., 333. 

 Eleodcs opaca, life history, 260. 

 Elephant grass, culture in Florida, Fla., 37. 

 Elk herds, national, 56. 



Elm — 



leaf beetle, biology, 59. 

 leaf beetle, notes. Conn. State, 159. 

 sawfly leaf miner, notes, 759. 

 Elodea canadensis as silage plant, 737. 

 Ely m us — • 



macounii, analyses, Wyo., 333. 

 mollis as silage crop, Alaska, 30. 

 Embryonic development, relation to suck- 

 ling, 862. 

 Emmer — 



as affected by Hessian fly, Kans., 34. 

 culture experiments, Ariz., 332 ; Nebr., 



36. 

 field tests, N.Dak.. 824. 

 growing with barley, S.Dak., 435. 

 Empoa roscE, studies, N.Y.State, 252. 

 Etnpoasca — 



mail, studies, 847. 



unicolor, studies, 848 ; N.Y.State, 252. 

 Empusa lecanii on green bug, 59. 

 Enamel ware, acid tests, 314. 

 Endive, aerial fertilization with carbon 



dioxid, Vt., 833. 

 Endocrine organs, monograph, 172. 

 Energy — 



available, recovery in fattening steers, 



769. 

 exchange in man, 563. . 

 expenditure, estimating by indirect 



calorimetry, 172. 

 expenditure of women workers, 761, 



856. 

 metabolism as affected by phlorizin, 



68. 

 utilization in relation to mineral 

 metabolism, 558. 



Engines — 



Diesel, fuels and uses, U.S.D.A., 585. 



internal combustion, lubrication, 691. 



tractor, fuel efficiency and gear changes, 

 886. 

 Enteritis, chronic. (See Johne's disease.) 

 Enterohepatitis, infectious. (See Black- 

 head.) 

 Entomological — 



field experimentation, methods, 250. 



research, bioclimatic law in, 16. 



research in Great Britain, 399. 

 Entomology — 



as affected by the war, 57, 162. 



economic, class book, 56. 

 Enzym action, studies, 202, 409. 

 Enzyms — 



of plants, reactions, Del., 132. 



oxidizing, of plants, 203. 



proteolytic, of soil organisms, 822. 



(.S'ee also Ferments.) 

 i:pliippiffcr terrestris, absence of comple- 

 ment in blood, 754. 

 Epicwrus formidulosus, notes, Fla., 548. 

 Epilobium angiistifolium — 



as honey plant, Can., 556. 



as silage crop, Alaska, 30. 

 Fpilobium, variation and mutation in, 330. 

 Epiphytes, osmotic concentration, -20. 



