976 



EXPERIMENT STATION EECOED. 



Plants— Continued. Page. 



chemistry of, treatise 310 



cold resistance in 333 



cultivated, insects affecting 752 



cultivated, of East Indies, treatise 697 



desert, root systems 827 



distribution of ions in 30, 31 



distribution, temperature coefficients in. 117 



economic, at Amani testing gardens 644 



economic, of Dutch East Indies, treat- 

 ise 521 



economic, of New Caledonia, manual 445 



economic, of Philippines 145 



electroculture experiments 225 



feeding with fertilizers through leaves. . . . 128 



formation of anthocyan pigments in 129 



geo tropic stimulation and response in — 429 



growth in partially sterilized soils 225 



heredity in 328, 329, 330, 331, 732 



immunity in 849 



imports, U.S.D . A 730 



in Government of Viatka, feeding value 



and toxicity 577 



irritability of, treatise 429 



localization of nitric salts in 30 



medicinal, breeding experiments 631 



medicinal, notes, U.S.D. A 145 



mutual stimulation through roots 522 



ornamental, culture experiments, Oreg. . 441 



ornamental, diseases of 240 



ornamental, insects affecting 240 



ornamental, manuring 445 



ornamental, of central Europe, hand- 

 book 742 



ornamental, varieties, Oreg 441 



parasitology of, treatise 536 



parthenogenesis in 329 



periodicity o f specific characters 224 



propagation and pruning 236 



relation between phyllotaxis and stem 



growth in 725 



relation to humus 122 



resting portions, life processes in 725 



role of calcium and strontium in 523 



shortening vegetative period of 725 



temperature of different parts 30 



tolerance for toxic inorganic salts 130 



tropical, bark beetles affecting 660 



water relations 223 



wild economic, of South Kamerun 239 



woody, forcing of, bibliography, U.S.D.A. 642 



wounded, infection 243 



Plasmas, living, coalescence of 224 



Plasmolysis, false, in young cells 130 



Plasmopara— 



nivca, notes 240, 746 



viticola, studies 452 



Plaster, land. (See Gypsum.) 



Platinum, metallic, effect on Aspergillus 



niger 824 



Playgrounds, development and care, S.C 645 



Plenodomus destruens n.sp., description, 



U.S.D.A 351 



Pleurisy, exudative, in horses, treatment 385 



Pleurotropis— 



rugosithorax n.sp., description 59 



utahensis n.sp., description 661 



Page. 



Pleurotus ulmarius, description 151 



Plowing— 



experiments 190 



technical instruction in 299 



Plourightia morbosa, notes 542, 651, 750 



Plows- 

 motor, description 590 



motor, tests 388, 789 



steam, djTiamometer for 380 



Plum- 

 bacterial canker, notes 245, 537 



buds, resistance to frost, N.Mex 839 



curculio, remedies, N.J 355 



die-back or winterkilling, notes 537 



disease, investigations 451 



sand-cherry, Cikana, description, S.Dak. . 640 



yellow leaf, description and treatment, 



" N.Y.Comell 848 



Plumbing— 



for country homes, U.S.D.A 690 



household, notes 893 



Plums — 



culture, Can 840 



culture in southern Utah, Utah 442 



insects alTecting 753 



Monilia on 647 



new, description, S.Dak 640 



pruning. Ark 739 



seedling, variation in 144 



sod mulch v. cultm-e, Mich 640 



varieties for Canada, Can 840 



Pneumonia— 



in lower animals 579 



interstitial, in lung of camels 680 



Poa, ash constituents of 334 



Poa— 



pratensls, germination as affected by light 531 



pratensis, germination tests 437 



spp., seeding on ranges, U.S.D.A 35 



Podabrus pruinosus, notes 459 



Podocarpeae, root nodules of 523 



Podothrips semijlavus n.g. and n.sp., descrip- 

 tion 658 



Poacilocoris spp., notes 853 



Pcccilonota decipiens, notes 455 



Pokeweed, notes, U.S.D.A 145 



Polenske number, determination 114 



Poles- 

 preservation 146, 239, 845 



production in Canada 744 



telephone, tests, U.S.D.A 843 



Poliomyelitis — 



and dog distemper, relationship 781 



transmission 753 



Polliniafulva, analyses 565 



Polycystus focrsteri n.sp., description 661 



Polyetes a bolineata, notes 553 



Polygonum— 



convolvulus, notes 236 



( Fagopyrum) tataricum, notes 838 



PolygrapJius n.spp., descriptions 757 



Polymnia edulis, culture experiments 640 



Polyneuritis— 



gallinarum, pathology and treatment 187 



galltnarum, studies 687 



in guinea pigs and pigeons, treatment — 79 



