980 



EXPERIMENT STATION RECORD. 



Page. 



Pear diseases, studies -MO 



foliage, studies 407 



hold-over blight, studies, Colo 646 



leaf scald or fruit spot, description 449 



psylla, notes 147 



slug, notes 146,863 



tree wood and bark, composition 407 



Pears and apples, handbook 45 



buprestid beet le affecting 61 



fall V. spring planting 238 



frost rings on, U.S.D. A 244 



growing on grass land 639 



index to varieties 441 



injuries by freezing 749 



occurrence of glucosid in 327 



wound stimulation and closure in 826 



Peas, alcoholic fermentation in 731 



as a green manure, Wyo 534 



affected by disinfectants 820 



ether 127 



assimilation of nitrogen by 32 



composition as affected by companion 



crop 617 



eultm-e, Oreg 539 



fertiUzer experiments .... 527, 622, 63 1, 818, 835 



field, culture 830 



relation between size of seed and 



yield 434 



forcing by electricity 136 



inoculation experiments 233 



Insects affecting 857 



root development with other crops 129 



Sturt, hybridization experiments 834 



varieties 631, 632, 835 



water requirements 129 



Peasants, Italian in Sicily, standard of hving. 358 



Peat, availabUity of nitrogen in, Conn. State. 523 



bogs, utilization 323 



effect on nitrogen assimilation in plants 319 



extract, eflect on nitrification 721 



fertDizing value 323 



filler, analyses, Mich 715 



moss litter manure, notes 527 



Pecan leaf blotch, notes 56 



Pecans, analyses 337 



culture in North Carolina 337 



value and adaptability in the South. 744 



Pediculidse, notes 655 



Pediculoides ventricosus, parasitic on fig moth, 



U.S.D.A 248 



Pediculus spp., transmission of typhus fever 759 



Pedogenesis, studies and bibliography 147 



Pegomya betas, life history 452 



brassicse. (See Cabbage-maggot.) 



ruficcps, notes, U.S.D, A 250 



Pellagra, photodynamic theory of 871 



relation to corn 486 



diet 263 



sand-flics 656 



Pemphigus betx, treatment 648 



imbricator, notes 147 



tessellata {acenfolii), notes. Me 753 



PeniciUium-- 



casei, notes 479 



glaucum, behavior with acetic acid 203 



fixation of atmospheric nitrogen 123 



Page. 

 PenkilUum — Contmued . 



glaucum, isolation from cheese 479 



occurrence in sugar 505 



studies 749 



Pennisetum macrostachyum, notes 362 



Pennsylvania College, notes 494, 695 



Institute of Animal Nutrition , 



notes 97 



Station, notes 494, 695, 899 



Pentarthron carpocapsx, notes 557 



minutum, parasitic on pear slug. . 863 



Pentosid, guanin, from molasses residue 116 



Peonies, classification, N, Y.Cornell 542 



Pepper adulteration, detection 805 



destruction by black scale, Cal 555 



disease, description 4^18 



host plant of fruit fly 758 



Peppermint, essential oil of 504 



Pepsin and chymosin, identity 107 



separation from rennin 803 



studies 265 



Peptone, assimilation by plants 32 



nitrification in soUs 722 



Peptones, effect on baking quality of flour. . . 356 

 Perchlorates, determination in presence of 



chlorids and chlorates 511 



Perhydridase, studies 310 



Perhy drol as a mouth wash in milk testing . . 712 



nature and use 580 



Peridental membrane, relation to mastication 360 



Peridermium spp., notes 67 



strobi, notes 853 



Peridroma saucia. (See Cutworm, varie- 

 gated.) 



Perilitus Icptopsi, parasitic on apple root borer 353 



Perinephritis in domestic animals 176 



Peripneumonia in bovines, immunization . . . 676 



Peronospora effusa, notes 548 



gangJiformis, prevention 342 



parasitica, staining 52 



trifoliorum, description 846 



viticola, investigations 450 



Peronospora, treatment 345 



Peroxidase, activity in diseased potatoes 548 



as a ferment 202 



histological-chemical detection.. 278 



isolation from plants 326 



of human milk 410 



relation to respiratory pigments 



of plants 326 



Peroxydiastase of wheat, resistance to heat. . 866 



Perry, clarifying with casein 26 



Persea gratissima, new beetle affecting 151 



pubcscens, analyses, U.S.D.A 612 



Persimmons — 



artificial ripening of 327 



loss of astringency during ripening 327 



premature dropping, prevention 237 



tannin-colloid complexes in 564 



Pestalozzia palmarum, notes 145 



Phagocytosis, notes 676 



Phaseolin, utilization 564 



Phaseolus lunatus, intoxication of horses by . . 887 



spp., notes 362 



Pheasants, secondary sexual characters in... 774 



Phcnacoccus acericola, notes 147 



Conn.State 856 



