942 ANNUAL REPORTS OF DEPARTMENT OF AGRICULTURE. 



Page. 



Peat, Ufidity, rciiuiicnunls for j^rowin^' blu(l)rrrit's 447_44g 



Pecan, insocts injurious, study by Entomology Bureau 545 



invest igatioii.s 352 



study of seal) and other problems 55, 283 



Prdiciiloidcs vnitriroNiis, enemy of jointworm and parasites 530 



Pedijrree record assoeialions, supervision 218-219 



Pellatrra, relation of corn, remarks 298 



Pcnirillinm, mold species, studies 241 



Pennsylvania Slate Colleo;e, cooperation with Soils Bureau 110 



Pepper, p:;prika, demand, o^rowlh of industry, etc 59 



Peppermint oil, invest illations 441 



Perfumery plants, outlook for study 299 



Perfumery-plant invest'<;al^ons, remarks 296 



Perishable products, handling 157 



Permits, grazing. National Forests, numbers and kinds 397-399 



Persimmons, Chinese seedless, experiments in North Carolina 79 



Japanese, experiments 344 



ripening methods, study 437 



Personnel, Committee, work, cases, etc 889 



Pheasant ]>ro]>agat ion, note 129 



I'hiladelpiiia laixnatory, food and drug inspection work, 1910 473-474 



Phosphates, use as fertilizers, nature, value, etc., cooperative studies 502-503 



Phosphoric acids, quality, investigations 447 



Phosphorus, occurrence in wheat and cotton-seed meal, study 449 



Physical investigations. Plant Industry, remarks 325 



Physiological investigations, review 298-299 



Pine, white, experiments in thinning 410 



seedlings, blister rust, control method 55 



Pineapple disease, investigations and control experiments 146 



dried, method of preparation, study 437 



growing, experiments at iHawaii station 752 



Pineapples, study, note 142 



Pittsburg la))oratory, food and drug inspection work, 1910 474^75 



Plague, danger of becoming endemic through ground squirrels ] 22-123 



infection of wood rat, note 127 



spread by animals and insects, notes 121, 122 



transmission by California ground s(]uirrels, control measures, etc. . . 550 



Plant breeding, experiments with alkali and drought-resistant varieties 72-73 



diseases, cooperative studies 281 



studies at Port Rico station 754 



food, absorption by plants, work. Chemistry Bureau 448 



secondary elements, functions 319 



growth, early stages, studies 449 



influence of fertilizers, investigations by Soils Bureau 506 



Industry Bureau, appropriation, disbursements, and balance 570 



contracts, leases, and bonds, number prepared by 



Solicitor 887 



cooperation in study of wheat and bleached flour. . 466 



with other executive departments 100-101, 



447-453 



cooperative studies of citrus fruits 437 



codling moth control 527 



fruit and fruit products 436 



insecticides and fungicides. . 479-480 



force, number, and classification 902 



officers 910-911 



organization and policy, changes 280 



publications issued during year, new and reprints.. 681-688 



report of Acting Chief, 1910 279-362 



review of work by Secretary 53-86 



introduction, progress 77-79 



nutrition, investigations, remarks 318 



pathology, investigations and work 53-57 



physiology, investigations 106-107 



Planting crops, dates, investigations by Bureau of Statistics 701-702 



Plant-introduction gardens, work 355-357 



