998 ANNUAL REPORTS OF DEPARTMENT OF AGRICULTURE. 



Page. 



Plants, water requirements, studies 139 



Pleuropneumonia, extirpation, act for 778 



Plowing, insect destruction, profit 509 



Plum curculio, control investigations 511-512 



Plumage traflic, investigation and control 547 



Poaching, bird reserves, prosecutions 542, 543, 544 



Poison bait for destruction of ground squirrels and other rodents 536-537 



Poisonous plants, protection of live stock in National Forests, work 397 



studies 61-62,92 



Poisonous-plant investigations 277-278 



future work 280 



Polarization, studies by Weather Bureau 162 



Poles, telephone and telegraph, insect damages 508-509 



Political activity, assessments, etc., order of Secretary 804-805 



Poll evil, treatment with autogenic vaccines 240 



Polygnotus, enemy of Hessian fiy, note 515 



Pomological collections, work, etc 322-323 



Society, American, catalogue revision 65 



work, miscellaneous 330-331 



Pomology, field investigations 323 



investigations, review of work by Secretary 65 



Pork, cold storage, costs 30, 31 



months, etc 27, 28, 29, 30 



percentage in 33-34 



exports, note 24 



price changes, notes 32,33 



production in South, cooperative feeding experiments 46 



investigations in Alabama 208 



trichinae, description, danger, control methods, etc 202 



Port laboratories, inspection of food and drugs, work 426-433 



Porto Rico Experiment Station, review of work by Secretary 143-144 



work, 1911 700-702 



live-stock diseases, control work, 1911 231-232 



Potash fertilizers, study by Soils Bureau 109-110 



salts in desert basin, etc., study 109 



sources, study by Soils Bureau 109-110 



Potato breeding, work 317 



disease on irrigated lands, note 73 



diseases, control 57 



investigations 317 



sweet, diseases, work 266 



wilt, description, cause, control methods 57 



Potatoes, crop of 1911, remarks liy Secretary 17, 20, 21 



disease-resistant, trial work 318 



exports, note 24 



growing and yield, Alaska 697, 698 



sprouting l)efore planting, experiments, Alaska 698 



starch content, studies 461 



varieties, investigations 66-67 



Poultry and eggs, monthly statements, Crop Reporter 648 



breeding, experiments, transfer to Beltsville Experimental Farm 198 



for egg production, etc. . experiments 46 



clubs, girls', organization and methods 77 



cold storage, costs 30, 31 



months, etc. 27, 28, 29, 30 



percentage in 33-34 



diseases, investigations, 1911 241 



dry packing v. wet packing, studies 445, 446 



feeding tests and experiments 207 



field investigations 445, 447 



handling, field work and scientific studies 79-81 



investigations, 1911 206-207 



proposed work 469-470 



laboratory investigations 448^49 



milk fattening, studies 207 



price changes, notes 32-33 



products, value in United States for 1910-11, note 11 



