INDEX OF SUBJECTS. 



991 



Page. 



Silage, use 68 



Silicate rocks, extraction of potash from, 



U.S.D.A 628 



Silicates as a source of potash 724 



in milk from glass bottles 376 



Silk culture in Philippines 659 



eri, notes 861 



moth, univoltin, development of eggs . . . 456 



producers, lepidopterous, classification . . 456 



Silkworm disease, notes 456 



muscardine. notes 456 



I)ebrine, studies 762 



Silkworms, papers on 456 



Silos, cement, construction 89, 793, 89S 



stucco, construction 590 



notes 68 



Mo 4S6 



Wash 872 



Silvanus surinamensis, notes, Can 755 



remedies, O hio 258 



Silver nitrate, effect on starch ferments 109 



Silvicultural experiments, methods 647 



Silviculture in Costa Rica 147 



Simodactylus cinnamomeus, noios, Hawaii — 656 



SimuUidaj, Braaihan, studies 57 



Simulium dinellii, notes 560 



spp., relation to pellagra, Ky 156 



Simulium larvae, parasites 456 



Sinapis arvcTisis, genetic studies 533 



Sinozylon sudanicuvi, notes 54 



Siphanoptera of Peru 862 



Siphons, use on the farm 589 



Sirups, table, studies 766 



Sisal, binder twine from, U.S.D.A 534 



date of cutting test 234 



industry in Hawaii, Hawaii 717 



leavtts, composition, Hawaii 718 



waste, utiliiation, Hawaii 717 



Sitotroga cerealella. (,See Grain-moth, Angou- 

 mois.) 



Skim milk, utilization, treatise 75 



Skins and hides, book 775 



Skulls of wild and domestic animals 467 



Sky polarization, changes in neutral points, 



U.S.D.A 316 



Slag. {See Phosphatic slag.) 

 Slaughterhouses — 



inspection in Pennsylvania 475 



municipal, descriptions, U.S.D.A 167 



plans and specifications, U.S.D.A 167 



Smelter gases, effect on piaes 154 



Smicra bergi, notes 559 



Smoke, effect on fruits 831 



soils and vegetation 229 



handbook 212 



Smut fungi, treatise 746 



spores, determination in wheat bran ... 310 



treatment 132, 149 



(See also Barley smut, Oat smut, etc.) 



Snow, conservation 617 



fertilizing value. Can 317 



limits in different climates 510 



elides and slips, U.S.D.A 616 



from mountain slopes, U.S.D.A. 414 

 survey in Sanpete Co., Utah, 



U.S.D_4. 616 



Page. 

 Snow surveys, value n irrigation projects, 



U.S.D.A 510 



Snowdrops, carbohydrates of, studies 427 



Snowfall, abnormal, at Springfield, Mo., 



U.S.D.A 413 



in Utah, U.S.D.A 413 



measuring 617 



Soap mixtures, preparation, Fla 356 



solutions, analyses, N.Y. State 441 



Social centers in the Southwest 796 



survey in Missouri 390 



Sodium— 



benzoate, determination in catsup 809 



physiological effect 365 



carbonate, effect on germination of 



dodder 28 



nitrification . . . 124 



plant growth .. . 500 

 chlorid. (See Salt.) 



citrate, effect on starch ferments 109 



fertilizers, effect on sugar content of 



plants 500 



time of application 125 



fluorid, use against roaches 55 



nitrate. (See N itrate of soda. ) 



salts, effect on ammonia-fixing power of 



soils 323 



flocculating power on clay 620 



silicate, fertilizing value 628 



sulphate, effect on nitrification 124 



fertilizing value 125 



Soil acidity, relation to plant cover 29 



aeration, effect on plant growth' 821 



notes 419 



bacteria as affected by alkali salts 124 



barnyard manure 518 



lime, Iowa 720 



distribution and activities 822 



relation to evaporation. Wis 516 



bacteriology, laboratory guide 728 



notes 516,621 



studies 517 



Iowa 720 



constituents, organic, studies 500 



fertility as affected by crop rotation, 



Minn 821 



conservation and improvement . 818 



determination 417 



in China, Korea, and Japan 518 



India 319 



maintenance, Ohio 124 



notes. Hi 216 



Wis 219 



problems. Wash 819 



relation to dairy farming 280 



earthworms 518 



Studies 500 



fungi, notes 223 



studies, N. Y.Comell 728 



imperviousness, effect on plant growth. . 500 



inoculation, notes and bibliography 322 



review of investigations 128 



Investigations in United States 117 



various countries 320 



moisture, effect on composition of grain. 



Can 334 



