976 



EXPERIMENT STATION RECORD. 



[Vol. 43 



Pediculus. (See Lice.) 



Pegomyia irassicce. (See Cabbage-maggot.) 



Pellagra — 



among war prisoners in Egypt, 863, 

 864. 



Studies, 263, 264, 461, 667, 863. 



types and treatment, 862. 

 Pellicularia koleroga, notes, 152. 

 Pempheres affinis, notes, 450. 

 Penicillium — 



glaucum, formation of fruiting bodies, 

 226. 



glaucitm, notes, 155. 



spp., on moldy grain, 445. 

 Pennsylvania — 



College, notes, 100, 200, 4&8, 599, 700, 

 900. 



Institute of Animal Nutrition, notes, 

 498. 



Station, notes, 100, 200, 509, 700, 900. 



Station, report, 598. 

 Peonies, new, descriptive list, 240. 

 Pepper — 



Chile, wilt disease, N.Mex., 347. 



die-back, notes, 444. 



disease, notes, 45 ; Ariz., 749. 

 Pepsin activation as afiEected by H-ion con- 

 centration, 611. 

 Peptone, preparation, 502. 

 Peridermium — 



pini, control, 755. 



pini, transmission, 449. 



stroM, notes, 552. 



(See also White pine blister rust.) 

 Peridermiums, sexual cell fusions. Pa., 544. 

 Peridroma sp., notes, U.S.D.A., 352. 

 Perilmnpus batavus n. sp., description, 259. 

 Perissopterus zebra, notes, 252. 

 PerJcinsiella — 



saccharicida, notes, 450. 



saccharidda, parasites of, 6G1. 



viticnsis, notes, 52. 

 Permeability — 



alterations at freezing temperature, 226. 



cell, relation to immunity production, 

 382. 



in plant cells, 821. 



studies, 225. 

 Peronospora — 



calotheca, specialization in, 653. 



n. spp., notes, 653. 



sclileideni, notes, 243. 



spp., descriptions, 248. 



spp., viability in seed, 550. 

 Perrisia affinis, on violets, 661. 

 Persimmons, time for transplanting, Mo., 



142. 

 Petroleum products, substitution of gas for. 



86. 

 Petunia — 



disease, new, 544. 



fungus disease, studies, 447. 



hybrids, studies, 222. 

 Phwnodiscus wneus, notes, 252. 

 Phakopsora zizyphi vulgaris, notes, 152. 

 Phassus ( ?) damoor, notes, 450. 



Phenol — 



determination, 614. 

 disinfecting power, 79. 

 Phenological — 



effect of the sea on plants, 523. 

 observations in British Islands, 17. 

 Phenolsulfonphthalein salts, efEect of phos- 

 phates on color, 313. 

 Phlegethontius — 



quingue -maciilattis. (See Tobacco 



worm.) 

 sexta. (See Tomato-worm.) 

 Phloroglucin test for formaldehyde, degree 



of alkalinity necessary, 804. 

 Pholus achemoii, studies, 453. 

 Phoma — 



lingam, notes, 46, 654. 

 omnivora, notes, 243. 

 sp. on coffee, 247. 

 sp. on Cupressus, control, 156. 

 Phomopsis citri, notes, 550. 

 Pliormidium foveolarum, effect of colored 



lights on, 526. 

 Phorocera claripennis, parasitism by, 759. 

 Phosphate — 



of lime. (See Calcium phosphate.) 

 requirement of soils, relation to phos- 

 phoric acid in oats, 519. 

 rock, availability as affected by leach- 

 ing, 427. 

 rock, effect on nitrate production, 111., 



214. 

 rock, fertilizing value, 817. 



(S'ee also Phosphates, compari- 

 son.) 

 rock smelting, 629. 

 Phosphates — 



acid and native, relative availability 



in presence of lime, 26. 

 availability, factors affecting. 629. 

 comparison, 26, 629. 816 ; Ga., 136 ; 

 La., 630; Md., 122; Minn., 815; 

 Mo., 721 ; Ohio, 324. 

 effect on action of a-crotonic acid, 131. 

 effect on colorimetric values, of pH, 



313. 

 effect on maturity of cotton, Ga., 137. 

 effect on nitrification in soils, Tex., 725. 

 insoluble, effects of composting on 



availability, Ga., 127. 

 solubility as affected by lime, 629. 

 soluble, manufacture and function, 424. 

 (See also Superphosphate.) 

 Phosphatic — 



fertilizers, composition and action, 26. 

 slag, analyses, 127. 

 slag, fertilizing value. (See also Phos- 

 phates, comparison.) 

 slag for pasture improvement, 519. 

 slag, increasing supplies, 519. 

 slag V. superphosphate, Ohio, 324. 

 Phos-pho-germs, fertilizing value, 27. 

 Phospho-organic reserves in green plants, 



525. 

 Phosphoric acid — 



content of oats as affected by fertili- 

 zers, 822. 



