INDEX. 661 



Page. 



Librarian, report for 1020 , 427-444 



Lilirarioa, Inireau, division, and office, work 440-442 



Lilirary — 



accessions, books and pamphlets 432 



appropriations and expenditures, 1911-1920 442-443 



Crop Estimates, Bureau, work 413, 440 



circulation statistics 429-431 



Forest Service, work 254, 440 



printing and binding, expenditures, 1919, 1920 ' 444 



Weather Bureau, work of year 86 



Lice — 



chicken, remedies, investigations 612 



hogs, control 150 



Light, effect on plant growth, studies 34 



Lilies, Easter, growing in District of Columbia and Virginia 20-21 



Limequat, Eustis, origin and description 182 



Limes, wither tip investigations 218 



Linters, cotton, paper mamifacture from 249 



Live stock — 



associations, relations with Forest Service 236 



"Better sires" campaign, progress and results 34 



breeding: — 



Alaska 457-458 



Guam 462-463 



changes on farms, reports 407-408 



destruction by predatory animals, losses, and control 344-346 



diseases, control work. ." 30-31, 89-90, 132-133 



exports. 1910-1920 11 



extension work 93, 97, 99, 100, 105 



grazing, permits, fees, and animals grazed 234-238 



improvement — 



by breeding and selection 34-35, 91-95 



in South 467-468 



interstate commerce, inspection, etc 130 



marketing — 



and market news, work 537-539 



legislation, need 57 



markets, supervision and control of commission men 18-19, 539-540 



number on farms 1920, remarks by Secretary 3 



numbers on farms, 1910-1920, and exports 8, 11 



poisoning by plants, investigations 141-142 



purebred, exports 92, 101 



reporting service, importance and need of expansion 17-18 



saving in drought areas 95 



South America, conditions , 534 



transportation — 



and quarantine laws, violations 130 



twenty-eight hour law, work of Solicitor 1 . 584, 597 



values of nroducts, decrease in 1920, remarks by Secretary 11 



LiviMG.sTox, Georoe, report as Chief of the Bureau of Markets 531-567 



Loans, books and periodicals, and interlibrary loans, 1920 429-431 



Loco plants, studies 193 



Lotus spp. , growing in Tennessee 190 



Louisiana — 



Iberia Experiment Farm, live stock production 155 



pink boUworm, control work, 1920, reAdew 6-7 



Lumber — • 



industry, studies 252 



kiln-drying, studies 248 



supply, A laska forests, development 49 



Lungworms, i)ig8, infection studies 150 



MacDonald, Thomas H., report as Chief of Bureau of Public Roads 491-529 



Machines, milking, ways of cleaning 93, 113 



Maggot, walnut-husk, investigations 317 



Mahonia spp., susceptibility to black stem rust 202 



Mailing lists, foreign, work of library 434-435 



