556 INDEX. 



Roads — Page. 



building and maintenance, investigations 412, 414 



Bureau — 



aid of Solicitor on Federal Aid Road Act 474, 481-482 



cooperation with other Federal branches in war work 392-393 



library, work, 1919 346, 347, 349 



report of Chief, 1919 391-426 



war activities, members in military service, etc 391-394 



construction, work of Roads Bureau 35-42 



Federal aid — 



materials tests, Roads Bureau 423 



projects, miles, and types, 1917, 1918, 1919 398-408 



results, and proposed changes in law 35-42, 43, 44 



management and economics, work, 1919 414 



models and exhibits, work, 1919 413 



National Forests — 



construction, mileage, cost, etc 197-202 



mileage and cost, by States 409—111 



projects approved by flighways Council 395 



Rodents — 



control, work of Biological Sarvey , 1919 279-283 



relation to forage production, studies 289-290 



Rootworm, com, investigations 248 



Rosin, investigations 232 



Rots, fusarium of corn, investigations 170 



Roundworms — 



hogs, investigations and control 130 



sheep, investigations and control 130 



Rural — 



economies, cooperation, work of Markets Bureau 435-436 



engineering, work of Roads Bureau, 1919 417^19 



Rust — ■ 



black-stem, wheat disease, control 521-522 



blister, white pine, cause and control 175-1 76 



Rusts, wheat, barley, and rye, control '. 168-170 



Rye, leaf rusts control ". 169-170 



Salmon, canned, inspection and studies 214, 221 



Salt, by-product of kelp industry, value 243, 244 



Sauerkraut, spoilage, studies 229 



Sawdust, redwood and spruce, use in grape packing 439 



Scab , wheat, cause and control 170 



Scabies, eradication, work, 1919 74, 75, 110-111. 131 



Schedius kuvanae, introduction, results 264 



Schools — 



agricultural teaching, investigations 357-358 



beekeeping 270 



Sea foods, studies by Chemistry Bureau 214, 221-222 



Seaplane, trans-Atl antic flight, aid of Weather Bureau 54-55 



Secretary, Agriculture, report, 1919 3-46 



Seed- 

 congressional distribution 1 64 



introductions, inspection 159 



marketing, investigations 442 



Reporter, printing and circulation 450 



reporting service, branch offices and voluntary reporters 449-450 



Seeds — 



importations, regulations 524-526 



new and rare, distribution 164 



Seismology, investigations 71-72 



Serum — 



control work ] 34 



use in producing immunity against hog cholera 124-124 



Sewellel, habits and control 281 



Sheep — 



breeding and handling, parasites, etc 75, 84-86, 110, 130, 131, 132 



farm, investigations and demonstrations 84, 85-86 



feeding, experiments 84-86 



