1920] 



INDEX OF SUBJECTS. 



949 



Ehrhomia cupressi, studlee, U.S.D.A., 



452. 

 Elachista — 



n. spp., descriptions, 55. 



spp., notes, 55. 

 Elaphidinn inerme, notes, 851. 

 Electric — 



arc nitrification, studies, 323. 



current from traction lines, Icaljage 

 into soils, 625. 



vehicles, tests, 4S4. 

 Electrical power in France, 790. 

 Electricity — 



on the farm, U.S.D.A., 486. 



use in agriculture, 285. 

 Electrodes of platinized glass, 612. 

 Electrolytes in leaf sap, concentration, 



633. 

 Electrophysiology, studies, 819. 

 Elevator .screenings — 



for fattening steers. Can., 672. 



recleaned, for live stock. Can., 868. 

 Elm guraniosls, 449. 



Emmer, wheat nematode attacking, 751. 

 Empoasca — 



mali, studies, 355, 655. 



miiitienda, notes, 255, 851. 

 Encyrtidce, Hawaiian, 662. 

 Encyrtus — 



barbatus, notes, 662. 



infidus, notes, 252. 

 Enderleinellus, new genus, 453. 

 Energy — 



expenditure of laborers, 463. 



requirements of children, 166. 



supply for cell growth, 131. 



values and starch values, 372. 

 Engine — 



cooling, principles of, 88. 



design, paper on, 890. 

 Engineering — 



agricultural. {See Agricultural engi- 

 neering.) 



dredging, treatise, 887. 



experiment station legislation, 305. 



for land drainage, 280. 



handbook, 278. 



waterproofing, treatise, 186. 

 Engineers, shortage, how to meet, TT.S.D.A., 



186. 

 Engines — 



fuel saving with carburetor, 890. 



gas, valve adjustments for low-grade 

 fuel. 483. 



intake-manifold temperatures, 800. 



internal-combustion, effects of heat 

 flow, 86. 



internal-combustion, fuels for, 389. 



internal-combustion, lubrication, SO. 

 483. 



internal-combustion, new fuel mixtures 

 for, 187. 



internal-combustion, valve springs foi-. 

 591. 



lubricating troubles, causes, 483. 



Engines — Continued. 



temperature and pressure stress, for- 



mula.s, 86. 

 tractor. (/See Tractor engines. ) 

 Enteritis, necrotic, in calves and lambs, 



Wyo., 179. 

 Enterohepatitis, infectious. (See Black- 

 head.) 

 Entomology, treatise, 850. 



(•S'ee also Insects.) 

 Entylia bactriana, life history notes, 850. 

 Enzym — 



action, treatise, 611. 

 activity of seeds, 10. 

 Enzyms — 



effect of concentration on rate of di- 

 gestion, 611. 

 in serum, effect on carbohydrate 



media, 782. 

 of Aspei-gUlus oryzcc and malt, com- 

 parison, 503. 

 of Aspergillus reperis in condensed 



milk, 779. 

 of milk, relation to abnormal flavors. 



Mo., 712. 

 studies, 311. 

 Epelis tnincataHa fexonii on cranberry 



bogs, Mass., 158. 

 Ephestla — 



caustella on dried fruit, 255. 

 huehniella. (See Flour moth, Medi- 

 terranean.) 

 EpUachna cotvupta — 

 notes, Colo., 158. 

 studies, U.S.D.A., 455. 

 Epiirix cucumci-is. (See Potato flea- 

 beetle.) 

 Epyris extraneits, parasite of Gonoceph- 



alum scriatum, 062. 

 Eriodendron anfractuosum, durability test 



of wood, 44. 

 Eriophyes — 



gossypii, notes, 252. 

 olsivorus, notes, 555. 

 Eriopijga inoincta, notes, 164. 

 E. sell sell oltzi<i californica, color pigments 



of, 632. 

 Essential oils. (S'ee Oils, essential.) 

 Kstif/mene acrwa. (See Caterpillar, salt- 

 marsh.) 

 Ether — 



as gasoline sul>stltute, 187. 

 extract, determination, 115 

 Eucalyptus — 



culture, Instructions for in Brazil, 442. 

 revision of genus, 543. 

 Eulecanium coryli, notes, 252. 

 Etimcncs spp., synopsis, 60. 

 Eumenidse, synopsis, 60. 

 Eupclmua sp.. notes, D.S.D.A., 365. 

 Euphalerus citri, notes, 451. 

 Euphorbia, latex vessels, function, 525. 

 Euproctls chrysorrhoea. (See Brown-tail 



moth.) 

 Etitclua bruchaphagi, notes, U.R.D.A., 365. 



