446 INDEX. 



Roads — Continued. Pfige. 



traffic, economic studies by Roads Office 336 



train, demonstration, equipment, towns visited, lectures, attendance 337 



Virginia experimental, cooperative maintenance, mileage increase, 



resurfacing, etc 333 



Rock, road-building, microscopic examination and classification, number 



and kinds of samples 338 



Rodents — 



destruction of forage on forest ranges 19 



extermination in National Forests, work of Biological Survey 172 



seed-eating, extermination 240 



Roquefort cheese experiments 94-95 



Rotterdam Cotton Exchange, adoption of U. S. cotton standards 409 



Roundworms, sheep, investigations and control, experiments 127-12S 



Rural — 



activities, social and educational 405-400 



credit, investigations 404 



Engineering — 



Division, work, 1916 343-344 



mechanical principles and problems, information furnished 344 



Organization— 



and Markets Office, creation, and change of name 3, 5 



investigations 404-406 



Office. See Markets Office. 



Salt, table, poison-elimination process, introduction . 35 



Sanitation, dairy, work, progress 96-97 



Sardines, canning methods, studies 197 



Sauerkraut, studies . 19S 



Sawmills, American, directory compilation, scope and value 190 



Scab, sheep, control experiments 128 



Scabies, sheep — 



and cattle, eradication 13 



cattle, and. horses, inspection and dipping 107-108 



Schattenfroh method of hide disinfection, results 124 



Schools — 



agricultural education, work of States Relations Service 300-302 



amount available for States from Forest receipts 177-178 



movable agricultural, work : 302 



Screw-worm fly, studies and control work 222 



Sea foods, utilization and transportation, studies 35 



Seacoast telegraph lines, Weather Bureau, locations, commercial busi- 

 ness, etc 54-55 



Seed- 

 germination and rate use, greenhouse investigations by Forestry 



Service 181 



importation 154 



improvement, work by department specialists, results 24 



quality, investigations 154 



sugar-beet — 



importation, regulation, administration 349 



production necessity 27 



testing work 154 



Seedlings, free distribution in Nebraska. 1916 168 



Seeds — 



distribution, scope and work 147 



marketing, investigations 401-402 



Seismological investigations, Weather Bureau 65 



Senecio, toxicity, investigations 120 



Serum — 



anthrax, use with spore vaccine 113 



hog cholera — 



effects of heat, drying, etc., experiments 122-123 



protection against foot-and-mouth disease virus 123 



results of treatment, 1913, 1914, 1915 70 



use in eradication of disease 14 



