INDEX OF SUBJECTS. 



985 



Plant— Continued. Page, 



diseases— continued. 



legislation concerning 239 



lessons on 394 



notes 745 



relation to bacteria 745 



review of investigations 145 



studies, Wis 840 



treatise 241,539,745 



treatment 50, 541, 745 



treatment, Term 635 



tropical, treatise 241 



(See also different host plants.) 



food, effect on ratio of tops to roots C28 



growth, accessory factors in 826 



growth and distribution, relation to 



transpiration 625 



growth as affected by carbon dioxid. . . 521,532 



growth as affected by electricity 189, 428 



growth as affected by radium emanations 821 



growth as affected by soil bacteria. Wis. . 827 



growth as affected by soluble humates. . . 516 



growth as affected by sulphur 623 



growth as affected by toxic salts 325 



growth period in Maryland and Delaware, 



U.S.D.A 614 



growth studies in field experiments 704 



growth studies, meteorological observa- 

 tions in, U.S.D.A 614 



inspection. (See Nursery inspection.) 



lice, jumping, of New World 453 



lice, notes 249,250 



lice, remedies 155 



(See also Apple aphis, etc.) 



life, treatise 32 



nutrition, accessory factors in 826 



nutrition, relation to rocks and soils 621 



nutrition, studies 620, 729 



nutrition, sulphur in. Wis 817 



parasites as affected by tellurium 826 



parasites, phanerogamic, notes 641 



parasites, treatise 539 



physiology in agricultural courses 701 



physiology, studies 221 



physiology, treatise and bibliography 323 



products, chemistry of, treatise 803 



propagation, lessons on 394 



quarantine laws of Montana, Mont 648 



roots, normal behavior of 221 



tissues, survival after freezing 130 



Plantago alpina, analyses 8^3 



Plantain, water, delayed germination in 824 



Plants— 



as affected by distilled water 730 



as affected by radio-activity 129 



as affected by smoke 521 



as affected by soot 827 



as affected by tarred roads 827 



as affected by tellurium 826 



assimilation of nitrogen by 223 



carbon nutrition of 426 



carotinoids in 803 



castration of 44 



certificated by Royal Horticultural So- 

 ciety 340 



chlorophyll formation in 519, 520 



classification, scientific basis 804 



Plants— Continued. Page. 



collection and preservation, U.S.D.A 394 



cultivated , relation to soil salts 627 



desert, of Mexico 132 



distribution 522 



distribution of aluminum in 129 



distribution of oxidases in 626 



experimental hyperplasia in 326 



for the desert 132 



fumigation with hydrocyanic acid 57 



green, respiratory coefficient 33 



growth in calcareous soils, P.R 816 



growth in glycogen solutions 625 



growth in heated soils 216 



heat development of 323 



hybrid, sterility in 225 



hydrocyanic acid in 520,826 



identification 340 



imports, U.S.D.A 327 



improvement by selection 130 



localization of betain in 108 



medicinal, culture experiments 536 



mineral nutrition of 221 



of Dade County, Florida 239 



of sand dunes of Coos Bay, Oregon 744 



ornamental, culture experiments 340 



precipitin reaction of 733 



protection against freezing 34 



protection, instruction in 395 



protein formation in 224 



ratio of tops to roots in 628 



relation between structure and physio- 

 logical characters 32 



. relation to soils 617, 791 



respiration as affected by electricity 33 



root systems 514, 733, 830 



sand, behavior on lime soils 425 



spore-bearing, hybridization in 823 



stem constrictions 343 



susceptibility to smoke, Iowa 628 



toxin formation in 627 



transpiration of in winter 728 



tropical and subtropical, treatise 235 



tropical, respiration in 222 



utilization of hydrocyanic acid by 730 



utilization of phosphates by. Wis 823 



utilization of solar energy by 221 



water requirements 327, 729 



wilting, studies 522, 729 



Plasmodiophora brassicx. (See Cabbage club 

 root.) 



Plasmodiophoracese, studies 145 



Plasmopara viticola — 



studies 346 



treatment 843 



Plaster- 

 cast of diseased fruits 748 



land. (See Gypsum.) 



Plastering, ex terior, specifications 387 



Plastids, constitution of 427 



Plathelminths, review of studies 154 



Plats, experimental — 



shape and size of, Me 131 



size of 333, 733 



Platycheirus albimanus, parasites of 62 



Platymesopus erausquinii n.sp., description .. 355 



Platypsylla castoris, parasitism 60 



