1919] 



INDEX OF SUBJECTS, 



991 



Silos— 



capacity, estimating, Mo., 691, 692. 



construction, 488 ; Ark., .".ST ; Iowa, 

 691. 



filling, 488. 



wall construction, effect on freezing 

 of silage, Iowa, 291. 

 fmraniia Surinam ensis, notes, 759. 

 Silver preparations, therapeutic, 7S1. 

 tfUphocoii/iie arenw. (Sec Grain aphis, 



European.) 

 Sires, influence on litter size, 268. 

 Sirup from sugar beets, 117. 

 Sirups, cane, composition and calorifK' 



value, 507. 

 Sisal hemp — 



as binder-twine fiber, I'.S.D.A., 039. 



culture experiments, Hawaii, 1 3S. 



production in Yucatan, 829, 

 Kilotroga cercalcUa. (See Angoumois 



grain-moth.) 

 Size factors of the animal body, nature of, 



473. 

 Skeletal — 



development, studies, 269. 



size factors, nature of, 473. 



structure, laws of, 269. 

 Skim milk — 



amino-acid content, 367. 



feeding value, 569; Mich., 74. 



nutritive value, 670; 111., 65. 



utilization, SO. 

 Skylark, food habits, 454. 

 Slag. (.S'ee Phosphatic slag.) 

 Slaughterhouse, municipal^ at Alexandria, 



279. 

 " Slick spots," studies, Idaho, 18. 

 Sludge, fertilizing value, 326, 627. 

 >-mall holdings — 



in Montserrat, 891. 



in Scotland, 792. 



(.S'ee also Land settlement.) 

 Smelter — 



by-products, fertilizer from, 427. 



fumes as affecting plants, 329, 427. 

 Smut remedies, analy.ses, Mich., 443. 

 Smuts, blossom infection by, 346. 



(See also Barley smut. Corn smut, etc. i 

 fmynthurodes hetce, identity, 255. 

 Snail, dangerous, introduced in California, 



548. 

 Snake bites, .serotherapy, 577. 

 Snapdragon rust, studies, 111., 752. 

 Snow — 



fertilizing value. Can., 510. 



influence on vegetation in Pyrenees, 

 328. 



melting in Oregon and Washington, 

 studies, 785. 



nitrogen, chlorin, and sulphates in, 620. 



surveys, Nev., 211. 

 Snyder, J. L., biographical sketch, 798. 

 Soap — 



colloid chemistry of, 310. 



determination, 116. 



metliods of analysis, 314, 412. 

 Soapweed as feeding stuff, Tex., 70. 



Soda water, bottled, precipitates In, N.Dak., 



669. 

 Sodammonium sulphate, manufactnie and 



fertilizing ralue, 516. 

 Sodium — 



absorption by wheat seedlings, 27, 



arsenite, persistence in soil, 625. 



as potassium substitute, R.I., 426. 



chlorid. (.S'ee Salt.) 



cyanid treatment of nematode-infested 



soil, 660 ; Fla., 548. 

 cyanid treatment of wireworm-infi>sted 



soil, N.J., 58. 

 effect oil different crops, 229. 

 hypochlorite. {See Hypochlorite, i 

 nitrate — 



and acetate, effect on soil solubil- 

 ity, Mich., 512. 

 availability as affected bv soils, 



X.J., 22. 

 determination of chlorates in, 803. 

 effect on composition of crops, 422. 

 effect on soil reaction, 323. 

 fertilizing value, 228, 229, 723, 

 815, 825, 826; Ark., 130; Can., 

 516 ; Mass., 21 ; N.C., 624. 

 limits of harmful effect, 815. 

 production and consumption, 22. 

 salts as soil amendments, 326. 

 salts, effect on potash solubility, 126. 

 salts, effect on soil structure, 519. 

 salts, toxicity, 320. 

 salts, toxicity as affected by manure, 



322. 

 sulphate, fertilizing value, 427. 

 sulphite, analyses, 112. 

 utility in relation to plant growth, 820. 

 Soft drinks, bottled, C.S.D.A., 669. 

 Soil — 



acidity — 



aluminum factor, 214, 428. 



as affected by various crops, R.I., 



135. 

 determining, 123. 

 effect on potato scab, 123. 

 method of stating, 205. 

 studies, 319, 321. 

 studies with peat and humus- 

 forming plants, 19. 

 (See alxo Lime, Limestone, and 

 Liming. ) 

 aeration as affecting root growth, 132, 



134. 

 aeration in India, 522. 

 amendments, action of, 326. 

 bacteria — 



as affected by manure, Del., 130 ; 



Ga., 130. 

 effect on phosphate availability, 



131. 

 lactose-fermenting, 888. 

 nonspore-forming, in manured 



soil, 20. 

 phosphate requirements, 721. 

 cultures, physiological balance, Mich., 



631. 

 cultures, salt ratios in, 820. 



