1917] 



INDEX OF SUBJECTS. 



965 



Pennisetum — Page. 



ciliare, analyses 334 



purpureum, composition and culture 230 



Pennsylvania- 

 College, notes 100, 197, 500, 696 



Institute of Animal Nutrition, notes 100 



Station, notes 100, 197 



Pentosans, determination 807 



Pentoses, destruction in alcoholic fermenta- 

 tion 609 



Pepper — 



anthracnose, notes 449 



breeding experiments, N.J 838 



fruit rot, notes 48 



mosaic disease, notes, U.S.D.A 451 



tree caterpillar, notes 654 



wilt, notes 449 



Peppermint oil, factors affecting composi- 

 tion, U.S.D.A 344 



Pepsin— 



as affected by organic acids 763 



protein cleavage by 108 



Peptids, effect on cobra venom hemolysis 276 



Perfume plants, treatise 142 



PeTideTmium— 



acicolum on Pinus resinosa 454 



balsameum, occurrence in Washington ... 651 

 harknessii and Cronartium quercuum, as- 

 sociation 454, 746 



strohi, notes. Can 454 



Perilampus chrysopz Ixvicephalus n.var., 



description 556 



Periodids, organic, studies 313 



Peronoplasmopara cubensis, studies 249 



Peronospora — 



arhorescens, notes 449 



polygoni on buckwheat 646 



sp. on cloves 348 



Peroxidases, plant, mode of action 609 



Persimmons — 



Japanese, culture in California 141 



navel, notes 536 



Pestalozzia — 



palmarum, notes 347 



sp. on Hevea and Kentia 348 



spp. on cacao 347 



Petunia mosaic disease, studies 6 17 



Petunias, inheritance of doubleness 826 



Phacidium infestans on western conifers 752 



Phxdon cochlearise, notes 658 



Phxnodiscus partifuscipennis n.sp., descrip- 

 tion 260 



Phai-macopoeia of United States 378 



Phaseoliis — 



lunatits, culture experiments 830 



vulgaris, tetracoty ledonous race 522 



Phelhmyecs sderotiophorus, notes 544 



Phenological observations in Nova Scotia 208 



Philxnus spp. — 



injurious to grass 856 



life history. Me 458 



Philagalhes Ixtus, notes 654 



Philaronia bilineata, life history. Me 458 



Philippine College of Agriculture, notes 600 



Phlaotribus liminaris, notes, U.S.D.A 258 



PMomis pungens, drought resistance 734 



Phoma— Page. 



lavandulx, studies 851 



tuberosa n.sp., description, U.S.D.A 249 



Phomopsis mali, notes 451 



Phonolite as a source of potash 728 



Phoracantha recurva, notes 300 



Phorantha occidentis, notes 255 



Phorbia — 



cepctorum. (See Onion maggot.) 



fusciccps, notes. Can 657 



Phorodon humuli. (See Hop aphis.) 



Phosphate- 

 deposits in Montana 728 



deposits in Tennessee 220 



insoluble, fertilizing value 332 



of lime. (See Calcium phosphate.) 



rock, action of mineral acids on 711 



rock, composting with sulphur 26 



rock, conservation 219, 220 



rock, dissolved. (Sec Superphosphate.) 



rock, fertilizing value 23, 738, 820 



rock, fertilizing value, Mich 735 



rock, fertilizing value, N.Dak 425 



rock, fertilizing value, Ohio 820 



rock, fertilizing value. Wis 626 



rock for peaty pastures 425, 740 



rock, production in 1914 124 



rock, production in 1915 219 



rock, production in United States 428 



Phosphates- 

 comparison 428, 738, 820 



comparison, Hawaii 427 



comparison, N.J 820 



comparison. Wis 626 



mineral, availability as affected by sul- 

 phur 821 



mineral, chemical nature 613 



mineral, solubility 626 



of Florida, analyses 821 



solubility in citric acid 727 



(See also Superphosphate.) 



Phosphalic— 



marls, analyses 821 



slag, citrate solubility 428 



slag, fertilizing ^■alue 123, 217, 228, 738, 8:33 



slag, fertilizing value, N.J 820 



slag for peaty pastures 425, 740 



slag, purchasing 738 



slag, use in Germany 726 



Phosphatids, distribution in milk 862 



Phosphoric acid — 



determination in soils 505 



extraction from phosphates 712 



in Hawaiian soils, Hawaii 427 



in starch 501 



loss during fusion with ammonium fluorid 613 



mobilization in soils 515 



recovering from phosphate rock 805 



water-soluble v. citrate-soluble 727 



Phosphorus- 

 determination in ash 204, 806 



determination in soils 413 , 012 



distribution in blue grass soils 424 



distribution in prairie surface soils 514 



organic, in soils 212 



pentoxid, determination 713 



