INDEX OF SUBJECTS. 



983 



Plants — Continued. Page, 

 ornamental, for latitude of St. 



Louis 493 



ornamental. Insects affecting 651 



ornamental, native to United 



States 535 



ornamental, nematodes affect- 

 ing 249 



ornamental, sports of 639 



ornamental, varieties, U.S.D.A- 231 



oxidative changes in 731 



parthenogenesis in 727 



Philippine, propagation by cut- 

 tings and layerage 436 



physiology of heredity in 822 



poisonous, of Colorado, Colo 576 



poisonous, of Union of South 



Africa 241 



preparation and mounting 94 



propagation by cuttings, Wash_ 694 



resistance to hot water 843 



respiration investigations 523, 524 



sexual development in relation 



to nutrition 824 



sexual reproduction in 526 



smoke injury to 744 



succulent, desiccation and 



starvation experiments 430 



transpiring power, studies 334, 728 



utilization of sulphur by 331 



Tariations in 635 



velocity of transmission of ex- 

 citation in 29 



water requirements 521, 522 



wilting 728 



wilting, drying and retur- 



gescence 825 



woody, bibliography 435 



woody of Oahu lowlands 345 



woody, phloem and bark dis- 

 eases of 442 



Plasmodiophora brassicce, (See 



Cabbage club root.) 

 Plasmopa/ra viticola — 



studies 352, 544 



studies, Wis 246 



treatment 748, 842 



Plaster, land. (See Gypsum.) 

 Plat experiments, elimination of er- 

 ror in, Mich 735 



Platinum, scrap, conversion into 



chloroplatinic acid 804 



Platyparea paecilaptera, notes 851 



Platypeza of Virginia 857 



Plenodomus fuscomaculans, growth 

 and pycnidium formation, U.S. 



D.A 647 



Plenodomus sp. on apples, Mich 744 



Pleospora lespedezw n.sp., descrip- 

 tion 242 



Plesiothrips, erection 356 



Pleuro-pneumonla, contagious. (See 

 Influenza, equine.) 



Plowing, deep v. ordinary. Pa 124 



Plowrightia morhosa as affected by 



cold. U.S.D.A 538 



I'lows — Page, 



draft of. Pa 125 



motor, tests 686,788,891 



Plum- 

 brown rot, notes 241 



silver leaf disease, studies 648 



wilt, studies, Ga 747 



Plumbing for country homes 286 



Plums — 



Cytospora disease of 648 



improvement in Minnesota 637 



picking and handling 437 



pollination 233.341 



varieties resistant to brown rot, 



U.S.D.A 444 



wild goose, changes in during 



ripening 802 



Plutella macuUpenivis, (See Dia- 

 mond-back moth.) 

 Pneumonia, equine. (See Influenza, 



equine.) 



Pneumonyssus foxi n.sp., description 364 



Podisma frigida in Alaska 61 



Podophyllum emodi, culture 346 



Podosphwra spp., notes 247 



Po 'osporiella verticillata n.sp., de- 

 scription 644 



Poisons — 



detection in water 410 



organic, effect on plant cells 526 



Polariscope, sodium lamp for 804 



Political economy instruction in agri- 

 cultural schools 693 



Poll evil, immunization 580 



Pollen, formation 525 



Pollenla rudis, hibernation 254 



Pollination, physiology of 628 



Polychrosis hotranor— 



biology and remedies 654 



monograph 553 



remedies 63 



Polymorphism in fungi 32 



Polypeptids, synthesis by means of 



enzyms 708 



Polyporus vaporarius, studies 547 



Polysulphids, insecticidal value 61 



Pomace fly attacking blueberries. 



Me 852 



Pomegranate disease, notes, U.S. 



D.A 232 



Pomelos — 



bright V. russet fruit of 535 



composition and culture 835 



total solids and acidity, N.Dak_ 661 



Potnphopoea sayi, notes 752 



Pond lily aphid as a plum pest 550 



Pop corn — 



breeding experiments, N.J 144 



rice, studies. Conn. State 431 



viability tests, N.J 145 



Poplar borer, remedies 656 



Poppies, fertilizer experiments 820 



Poppy-seed cake, effect on milk and 



butter 570 



Population, Malthusian theory, trea- 

 tise 594 



