1917] 



INDEX OF SUBJECTS. 



969 



riant— Continued. Page, 



inspection. (See Nursery inspection.) 



introduction gardens, U.S.D.A 542 



juices, oxidase activity of 9 



lice, effect on pear roots, U.S.D.A 661 



lice, notes 460 



(See also Apple aphids, etc.) 



monstrosities in Buitmzorg 47 



parasites, effect on hosts 540 



parasitism, physiology 47, 245 



pectins, studies 300 



peroxidases, mode of action 726 



physiology, elementary, experiments 395 



physiology for horticulturists, treatise. . . 220 



products, analyses 114 



products, chemistry of , treatise 801 



propagation and breeding, textbook 795 



protoplasm, acidity 726 



succession, monograph 434 



succession, notes 526 



succession, relation to soil moisture 41S, 725 



tissues, freezing-point lowering 221 



tissues, permeability 128, 326, 431 , 632 



Plantago psyllium in South Australia 542 



Plantain — 



bacterial disease , notes 838 



ripe rot, treatment 154 



Plants- 

 adaptation 431, 725 



anthocyanin pigments f\33 



as affected by acids 224 



as affected by asphyxiating gas 153,253 



as affected by illuminating gas 72*^, 727 



assimilatory apparatus 222 



carbohydrate economy £24 



copper content 432 



correlation between homologous parts ... 630 



desert, transpiration in 129 



economic, at Horticultural Gardens, 



Lucknow 646 



fasciated, development 434 



flavone derivatives in 430 



growth as affected by organic substances. 632 



growth inhibition 324, 632 



house , treatise 346 



imports, U.S.D.A 819 



insect-catching, in southern Georgia 6nO 



leaf injury in relation to cold 224 



marine , tolerance to fresh water 431 



medicinal, culture and dr\-ing 145 



monocotyledonous, embryology 127 



new or noteworthy, tests 143 



nonlegume, symbiosis with nodule bac- 

 teria, 111 819 



ornamental, bud variation 546 



ornamental, culture experiments, Miim.. 241 



ornamental, tests, S.Dak 142 



ornamental, treatise 145,746 



oxidase activity 326, 429, 430 



poisonous to live stock in Great Britain.. 688 



root cuttings, chimeras, and sports 434 



seashore , as affected by water supply — 27 



self-sterile , behavior in intercrosses 820 



smoke injury to 130 



susceptibility to diseases and pests 245 



transpiration in 429 



transpiring power, determination 26 



transplanting lath for 836 



Plants— Continued. Page. 



utilization of calcium 631 



variation, non-Mendelian 725 



watering experiments 325 



woodland, emergence of aerial organs 625 



woody, anatomy 821 



woody, cambial activity 127 



woody, pocket guide 746 



Plasviodiophora brassicx. (See Cabbage club- 

 root.) 

 Plasmopara viticola — 



germination of winter spores 252 



notes 550 



Plaster, land. (See Gypsum.) 



Plowing experiments, Minn 227 



PlowTi'jhiia ribesia, notes 251 



Plows — 



motor, tests 591 



specifications 886 



Plum— 



apliis, cat-tail as a summer host 461 



aphis, reddish-brown, notes 562 



black knot, notes 555 



brown rot, notes 457 



ciuculio, remedies, Ohio 262 



dieback, notes 246 



leaf spot, studies 755 



seed oil, composition 410 



Plums- 

 acid content 714 



analyses 42 



breeding experiments 833 



culture in Europe 42 



culture in Maryland, Md 648 



culture in Mesa County, Colo 241 



dust V. liquid spraying 832 



planting at different ages G47 



pruning and training, W.Va 344 



pruning experiments, Miim 240 



spraying, N.J 744 



sterility, Minn 240 



varieties , Mont 241 



varieties, S.Dak 143 



varieties for Ohio, Ohio 241 



wild, recipes, Ala.Tuskegee 364 



Plutella maculipennis. (See Diamond-back 



moth.) 

 Pneumonia- 

 action of digitalis in 375 



contagious, in donkeys 692 



enzootic, in young pigs 477 



studies 274 



Poafertilis, pollination experiments 735 



Podagrion mantidiphagum n.sp., description. 467 



Poecilanthrax, notes 565 



Poisons, effect on germ cells of fowls. Me.. 370 

 Poles- 

 industry in Canada 245 



preservation 651 



PoUstes metricus, life history and habits 855 



PoUenia rudis, studies, N.J 665 



Polychrosis viteana. (See Grape berry moth.) 



Polydrusus impTessifrons, studies, N.Y. State. 359 



Polyides rotundus, analyses. Conn. State 814 



Polynema reduvioli n.sp., description 856 



Polyporus— 



lignosus, notes 349 



vaporarius, notes 253 



