980 



EXPERIMENT STATION RECORD. 



[Vol. S8 



Prussic acid. {See Hydrocyanic Page. 



acid. ) 

 PseudoamphhHomum danuiiense, in- 

 fection of pigs with 82 



Pseudococcus — 



adonidum, notes 464 



citri. {See Citrus mealy bug.) 



sacchari, notes 556 



Pseudocryphalus n.g. and n.sp., 



description 163 



Pseudodiaporthe coffece, notes 51 



Pseudohylesinus n.g. and n.sp., 



description 163 



Pscudomonas papulans n.sp. on apple 251 

 Pteris aquilina, toxic effect on horses 589 

 Pterocarpus santalinus, descriptive 



account 146 



Pteromalus hermleucw n.sp., descrip- 

 tion 165 



Ptomaine poisoning due to canned 



goods, Cal 208 



Ptomaines, formation in wounds 783 



Ptychodes trilineatus, studies, 



U.S.D.A 363 



Public health and medicine at Pan 



American Scientific Congress 580 



Puccinia — 



antirrhini, notes, Can 546 



asparagi. {See Asparagus rust.) 

 glumarum, introduction into 



America 147 



graminis, overwintering in Aus- 

 tralia 4S 



graminis, studies, U.S.D.A 47 



kuehnii, notes 550 



spongiosa, notes 848 



spp., overwintering and distri- 

 bution in South America 148 



spp., parasitism 448 



spp., spore germination 224 



suhnitens, ascial hosts 249 



. Pucciniastrum — 



pustulatum, inoculation experi- 

 ments 253 



pustulatum on Epilobium adeno- 



caulon 553 



Pufflnus, notes 457 



Pullets V. hens for egg production, 



Can 677 



Pulpwood industry in United States, 



U.S.D.A 447 



Pulvinaria — 



betulw, notes 464 



vitis {Annumerabilis.) (See 

 Maple-scale, cottony.) 

 Pumping plants — 



for irrigation, Mont 186 



of U.S.Reclamation Service 589 



reservoir capacity for 389 



Pumpkins — 



composition and digestibility. 



Mass 571 



use by prehistoric Americans.- 167 



Purdue University, notes 96, 



198, 399, 600, 797 



Purple scale on olive, Cal 157 



Pus cells. (See Leucocytes.) 



Page. 



Pyrotherapy, aseptic, notes 588 



Pyracmon conocola n.sp., doscription_ 164 



Pyralld— 



moth borers, new 459 



new, from California 766 



Pyrethrum, manganese content, U.S. 



D.A 207 



Pyrheliometers, comparison, U.S.D.A- 210 



Pyridin — 



effect on soil organisms, Vt 420 



in soils, studies, Ala.College 119, 129 



Pyrilla ahcrrans, studies 462 



Pyrocatechin, presence in plants 223 



Pyrogallol, effect on nitrification in 



soil, Ala.College 119 



Pyrox, fungicidal value. Conn. State- 235 



Pythiacystis citrophthora, growth in 



cultures 757 



Pythium — 



debaryanum, treatment, U.S.D.A- 149 



palmivorum, notes 354 



Quassia extract, insecticidal value, 



U.S.D.A 55 



Quince — 



borer, notes 465 



diseases, notes, N.J 50 



insects affecting, U.S.D.A 843 



Japanese, petalization 446 



Quinolin in soils, studies, Ala.Col- 

 lege 119, 129 



Rabbits — 



breeds and breeding 577 



color inheritance in 776 



control in Nevada 456 



immunity to hog cholera bacillus- 382 



treatise 174 



Rabies — 



dissemination by prairie dogs 80 



immunization 580 



Radiation in the atmosphere, U.S. 



D.A 210 



Radish seed, viability, studies 127 



Radishes — 



effect on succeeding corn crop-- 135 



winter storage, Vt 442 



Radium emanation from water, U.S. 



D.A 510 



Rafl[inose, effect on polarization of 



beet molasses 113 



Ragri, culture experiments 135, 433 



Ragwort, poisoning cattle in Eng- 

 land 82 



Rain — 



dissemination of plant diseases 



by, U.S.D.A 47 



fertilizing value. Can 619 



nitrogen, chlorin, and sulphates 



in 416 



nitrogen in, U.S.D.A 509 



tropical 415 



Rainfall — 



and gunfire 115 



and .gunfire, U.S.D.A 511 



annual, in United States, 



U.S.D.A 209 



at Temple, Tex 334 



