1919] 



INDEX OF SUBJECTS. 



979 



Pigmentation In lice, 552. 



(See also Color inheritance.) 



Pigs — 



age and weight, effect on gains, Ohio, 



271, 272. 

 alfalfa meal for, 273. 

 alfalfa pasture for, Ariz., 369. 

 as affected by acidity of ration, Iowa, 



273. 

 as affected by vegetable diet, 369. 

 barley for, 474. 



bracken rhizomes for, 270, 271. 

 breeding experiment.s, Kans., 74. 

 citrus-fruit rinds for, Md., 570. 

 cottonseed meal for, 369. 

 different types, practical utility, Iowa, 



273. 

 feeding experiments, 569, 675, 772 ; 



Can., 569 ; Del., 177 ; Fla., 508 ; 



Iowa, 272 ; Kans., 73 ; Ky., 74 ; Mc. 



674 ; N..I., 73 ; Ohio, 272. 

 following steers, Ind., 69. 

 grain sorghums for, 367. 

 grain substitutes for, Mich., 74. 

 hairless, 474. 

 hogging-down corn and peas, U.S.D..V., 



72. 

 hogging-down rye, Ohio, 569. 

 housing, 586 ; N.J., 73. 

 individual variation in economy of 



gain, 772. 

 marketing, N.C., 695. 

 mineral requirements, Kans., 73. 

 mineral supplements for, Ohio, 178. 

 pasturing experiments, Ohio, 178 ; 



U.S.D.A., 72. 

 peanut-fed, finishing, Ala.CoUege, 309. 

 peanuts for, Fla., 568. 

 potatoes for, Me., 142. 

 self-feeders for, 488, 569 ; Mo., 674 ; 



N.J., 73. 

 skim milk for, Mich., 74. 

 young, immunizing against hog chol- 

 era, 86. 

 (See also Sows and Swine.) 

 Pigweed seed, feeding value, Can., 569. 

 Pikas, North American, descriptions, 547. 



Pine — 



as affected by nitrification of soil, 125. 

 beams, load tests for shear, 584. 

 blister rust in Colorado, 351, 659. 

 blister rust, lif(> history, 752. 



(See also White pine blister rust.) 

 bull, culture experiments, Nebr., 652. 

 bull, for Kansas, Kans., 46. 

 for wood-block pavement, 790. 

 forests, brush-disposal, 839. 

 forests, regeneration, 344. 

 jack, root habit, 034. 

 pollen distribution, 46. 

 rust in ,'>weden, studies, 659. 

 spinning sawfiy, notes, 847. 

 spruce, frraft on, 47. 

 tube moth, life history, 665. 

 (See also Pinus and White pine.) 



Pineapple — 



black rot, notes, 450. 

 leaves, stomata on, Hawaii, 154. 

 mealy bug. notes, 756. 

 Pineapples — 



breeding experiments, Hawaii, 146. 

 culture experiments, 650. 

 fertilizer experiments, 837 ; Hawaii, 

 148. 

 Pink bollworm. (See Cotton bollworm, 



pink.) 

 PiKon blister rust, notes, 351. 

 Pinus lowjifolia forests, effect of fires on, 



840. 

 Pipe — 



cement, machine-made, Ariz., 288, 379. 

 for house drainage, 587. 

 Pipette aaid drop methods of measuring 



sera, 203. 

 Piricidaria oryzos, notes, 749, 841. 

 Pii-oplasmosls of cattle in Switzerland, 



286. 

 Piroplasnis, anaplasmatic forms, 875. 

 Pltniis huesanus n.sp., notes, 63. 

 Pituitary — 



body, relation to growth, 270. 

 feeding of white mice, effects, 767, 

 768. 

 Pituitrin, effect on milk secretion, 79. 

 Placenta as gland of internal secretion, 



173. 

 Plane tree disease in Victoria, 353. 

 Plant — 



associations on sand dunes, 633. 

 breeding, correlation coefiicient, demon- 

 strating, 697. 

 lireeding experiments, Mich., 636. 

 breeding, segregation of disease-suscep- 

 tibility factors, 747. 

 breeding, technique, Minn., 730. 

 breeding work in Scotland, 636. 



(See also Heredity, Hybridization, 



and Apples, Com, Wheat, etc.) 



cells, epidennal, plasmolysis. 818. 



cells in relation to size characters, 224. 



cells, nucleus as center of oxidation, 



221. 

 cells, permeability, 329. 



(See also Cells.) 

 chondriosomes, review of investiga- 

 tions, 727. 

 chromosomes, behavior in fertilization, 



431. 

 colloids, action in growth, 25, 26, 27, 



132. 

 development in relation to weatlier. 



222. 

 disease — 



immunity and its inheritance, 656. 

 information service in New York. 



245, 248. 

 inspection in France, 654. 

 organisms in soil, disinfection, 49. 

 organisms In soil, notes, 655. 

 research in Great Britain, 399. 

 survey jn New York, 245. 



