1918] 



INDEX OF SUBJECTS. 



977 



Plants — Continued. 



water, nitrogen fixation by 419 



water requirements, Nebr 228 



water reciuirements, Wasli 22G 



wilting and incipient drying 522 



Plasma membrane in plants 523 



Plasmodiophora hrassicw. (See Cab- 

 bage clubroot.) 



Plasmopara viticola, notes 651 



Plaster, land. {See Gypsum.) 

 Plat experiments — 



harvesting devices 22S 



technique, U.S.D.A 429 



Platychirus perpallidus, life history. 



Me 362 



Platygasterince, life history and key_ 565 



Platypedia areolata on olive, Cal 157 



Plectodiscella vcncta — 



life history and treatment, N.Y. 



Cornell 853 



n.sp., description 252 



Plenodomus fuscomaculans n.comb., 



notes 453 



Plesiocoris rugicollis, remedies 58 



Pleuro-pneumonia, contagious. (See 



Influenza, equine.) 

 Plodia interpunctella. (See Indian- 

 meal moth.) 



Plow bottom, studies, U.S.D.A 791 



Plowing depths, comparison. Pa 229 



Plowrightia morbosa, notes, Ohio 853 



Plows, motor, hitches and adjust- 

 ments 88 



Plum — 



aphis, mealy, in Egypt 158 



black knot, description and 



treatment, Ohio 853 



diseases, notes, N.J 50 



Plums — 



dusting experiments. Can 546 



fruit stocks for 345 



insects affecting 460 



insects affecting, U.S.D.A 843 



varieties, Tex 41 



Plusia brassicw in Maryland 154 



Pneumonia — 



equine, treatment 788 



septic, in horses 184 



Podospermum laciniatum, appear- 

 ance in South Australia 141 



Poison ivy, fat of 202 



Pokoweed, critical flowering and 



fruiting temperatures 330 



Polarimetry, book on 803 



Poles, industry in Canada 147 



Poliomyelitis — 



in horses in India 287 



transmission by insects 262 



PoUates hebrwus, notes 164 



Pollenia rudis, hibernation 262 



Polycaon confertus, notes. Cal 157 



Polygnotus vernalis n.sp., descrip- 

 tion 63 



Polygonum spp., toxic effect on plgs_ 589 

 Polymecus lasiopterw n.sp., descrip- 



tioa 165 



PoUjnema bifasciatipenne varium Page, 



n.var., notes 565 



Polyneuritis — 



relation to diet 568 



treatment 782 



Polyporacea; of Montana 553 



I'olyporua — 



rugulosus in Malaya 52 



schtoeinitxii, studies 355 



shorew n.sp., description 547, 555 



sliorew, notes 332 



Polystomidae of North America 365 



Polytrias prwuiorsa, tests, Hawaii 828 



Pomace fly, life duration 563 



Pomelos. (See Grapefruit.) 



Pomological work at University of 



California 446 



Pond mud, analyses. Can 626 



Pongamia glabra — 



as a green manure 220 



cake, fertilizing value 220 



Ponies, British breeds, improvement- 576 

 (See also Horses.) 



Pontia rapte. (See Cabbage worm, 

 imported.) 



Popcorn seed, sterilization 629 



Poplar — 



borer, notes 358 



leaf-hopper, studies 764 



weevil in Wisconsin 155 



Poppy blight, notes 351, 547, 548 



Pork — 



cured and salted, in United 



States, U.S.D.A 865 



curing on the farm, U.S.D.A 476 



Porthetria dispar. (See Gipsy moth.) 



Porto Rico — 



Insular Station, notes 499 



Station, notes 700, 900 



Station, report 796 



Station, work of 605 



Posidonia australis, fiber from 529 



Potash — 



assimilation by rice 340 



domestic sources. Conn. State — 625 

 effect on weed growth in 



meadows 141 



fertilizers, comparison 726 



fertilizers, comparison. Mass 218 



fertilizers, residual value. Pa. — 220 



fertilizing value 133 



fertilizing value, Mo 217 



fertilizing value, S.C 534 



for sugar cane, tests 135 



from beet and cane molasses 124 



from blast furnace flue dust 424 



from cement mills 124 



from cement mills, U.S.D.A 123 



from feldspar 123 



from greensand 123 



from marsh plants, Cal 520 



from sunflower stems 207 



phosphate fertilizers, Schroder's, 



tests 520 



phosphoric acid fertilizer, new_ 519, 726 

 production in United States. 326,424 



