INDEX. 667 



Potatoes — Continued. Page. 



insects investigations 319 



seed, supplies, and tests 176-177, 208 



Poultr>'— 



diseases, investigations 140 



feeding and breeding experiments 102-104 



investigations by Chemistry Bureau 270-271 



products, marketing ". 541 



Prairie dogs, extermination 348-349 



Precipitator, Cottrell, use in recovery of phosphoric acid 296 



Preservation, fruits and vegetables in transit and storage 535. 503-564 



Press- 

 clippings, information sheet 389 



contributions from information office 389-391 



Prices, farm products, 1920, comparison with 1919 11-12 



Print paper, investigations 281 



Printing — 



appropriations and expenditures 384, 398-399 



outside the Government Printing Office : 384-385 



restrictions by Congress 386-387 



Weather Bureau, oiitput 21 



Projects— 



forest roads, progress, 243, 511-514 



road, statements — ■ 



approval constniction, and types, tables 501-507 



work of Solicitor 583, 589 



Propionic acid, by-product of milk, use 110 



Proteins, fhemistry and ntitritive values 26') 



Prunes, brown rot, control 219 



Pruning, citnis fruits investigations 171 



Public roads — - 



BureaTi. See Roads Bureau. 



magazine, scope and issue 522 



Publications — 



Chemistry Bureau, notes 263-274, 279, 280, 283 



Crop Estimates Bureau 413_414 



Department, distribution 401-403 



Division — 



consolidation of informational work, etc 38 



duplicating work 40.3-404 



editorial, printing and index work 396-401 



report of Chief 383^04 



transfer of offices to 38, 44, 383, 391, 396 



Entomolog\- Bureau 310, 311, 319, 320, 331, 338, 341 



Forest Ser\-ice, new, and distribution 254 



M'arketa Bureau 566-567 



output and distribution 383-384, 398, 401-403 



Roads Office 522 



Weather Bureau 82, 85 



work of Department, re\'iew by Secretarj'- 38-39 



Pulp — 



nitrocellulose, determination by Forest Laboratory 249 



paper, resources in National Forest 230, 231, 251 



Pulpwood survey, necessity 252 



Quail — 



disea-'o, study 140 



importation from Mexico 376-377 



Quarantine — 



animal, work of Department 126-128 



cattle tick, areas released 90, 131 



gip^y and brown-tail moths, inspection work 328-329 



pink bollworm 618, 620-622, 637 



plants, work of Horticultural Board 613-640 



Quarantines — 



plant, new 635-636 



plant, lists 637-640 



