INDEX OF SUBJECTS. 



897 



Page. 



Rickia wasmanni, parasitic on ants 666 



Rinderpest, notes 28S 



prevalence in Ceylon 484 



susceptibility of bovines to 184 



treatment 484 



Riparia riparia, parasitism 362 



Rlpersla, new species, descriptions 54 



River systems of Manchuria 396 



Rivers, flow of, in Mississippi, U.S.D.A 419 



of lower Mlcliigan, U.S.D.A 15 



pollution in Massachusetts 313 



Road construction, slag for, U.S.D.A 489 



scrapings, analyses 326 



Roads, preservation experiments, U.S.D.A. . 489 



sand-clay, durability, U.S.D.A 490 



Robber-flies, notes 762 



parasitic on range caterpillar, 



U.S.D.A 464 



Robins, destructive to range caterpillars, 



U.S.D.A 464 



Rock asphalt for roads, U.S.D.A 490 



phosphate. (See Phosphate.) 



Rocks, analyses and bibliography 224 



carbonate, methods of analysis 511 



silicate, methods of analysis 511 



weathering investigations 314 



relation to colloid chemis- 

 try 416 



Rcesleria pallida, notes 654 



Rooks, feeding habits 657 



Roosevelt dam, testing, U.S.D.A 419 



Root crops, cost of production. Wis 435 



culture and storage. Wis 435 



in Washington, Wash ... 531 

 effect on carbon dioxid content 



of soils 523 



fertilizer experiments 633 



insects affecting 362 



methods and time of sowing 633 



treatise 435 



varieties 432,627, 633 



knot nematode, studies 655 



tubercle bacteria, tests 131 



Roots, effect on lava rocks 19 



for sheep 774 



method of destruction. Wash 490 



mutual interactions of 132 



osmotic excretion by 723 



pressure in, studies 527 



Sempervivum, relation to endotrophic 



mycorrhiza 629 



tree, adventitious development 345 



Roquette, prevalence in Ontario, Can 340 



Rose chafer, green, notes, Conn.State 361 



culture, treatise 642 



diseases, description and treatment. . . . 654 



descriptions 355 



sawfly, description 355 



Roselle, drying experiments, Ilawail 241 



new, description, U.S.D.A 143 



RoneVinia sp., notes 251 



Roses, abnormal growth 227 



culture 343 



insects affecting 355, 042 



synonymy 443 



thrips affecting 362 



I'age. 



RostTclla coffcx, disease resembling 152 



Rotation e.\periments 135, 532, 632 



Mo 20,21 



N.Dak 715,728 



Pa 531 



at Rosenthal 332 



in India 33,729 



for irrigated land in South Africa. . 32 



of crops, U.S.D.A 190 



for Illinois, 111 231 



irrigated lands 730 



relation to agriculture, 111 231 



systems for grain farming 18 



Rotations, econorftic value 533 



Rothamsted Experiment Station- 

 enlargement 599 



experiments 18 



history and work 232 



Rubber, analyses 45 



banana disease affecting 748 



Ceara, tapping experiments 738 



coagulating and curing experiments. 739 



culture in Cuba 334 



Trinidad and Tobago 45 



tropical countries 300 



Hevea, tapping, North way system.. 739 



increase in guayule under irrigation. 130 



industry in Asia 246 



the Ivory Coast 544 



nut cake, analyses 572 



Para, bark disease, studies 553 



culture 543 



experiments 738,739 



dieback, studies 552 



disease, characteristics 152 



diseases, studies 750 



role of hydrocyanic acid in 330 



tapping experiments 738 



preparation 544 



production in Madagascar 246 



shrub, guayule, notes 445 



propagation experiments 543 



Rum, analyses 210 



method of analysis 216 



Rumex hymenoscpalus, notes 33 



patientia disease resembling club root. 647 



formation of chromogens in. . 230 

 Ruminants, gain in protein as affected by 



nonprotein compounds 474 



visceral organs, studies 774 



Run-off In Owens Valley, U.S.D.A 15 



Rural conditions — 



improvement in Belgium 193 



through the rural home 797 



Rural depopulation in Belgium 593 



Europe 794 



France, causes 90 



counteracting 291 



various countries 193 



economics, bibliography 495 



economy in Italy 593 



relation to teachings of sci- 

 ence 692 



education, paper on 797 



suggestions for 293 



homes, relation to rural schools 769 



