520 INDEX. 



Page. 



Walnut, black, production and demand, war emergency 198 



War- 

 activities — 



cooperation of Animal Industry Bureau 71-77, 125 



Forest Service, 1918 165-166, 193-200 



conditions and activities in Weather Bureau 57, 58-59, 63 



emergency — 



entomological intelligence service 249-250 



food use, instruction courses 371 



research work, Forest Service 193-200 



service, work of Library, 1918 327 



work — 



cooperation. Chemistry Bureau, 1918 202, 211-214 



Roads Bureau cooperation, 1918 373-375, 392 



Warehouse Act, administration. Markets Bureau , 486 



Warehousing, cotton, investigations .' 469 



Warnings, Weather Bureau, storms and cold waves, 1918 59-61 



Wart, potato, introduction into United States 445-446 



Water power- 

 development, use, and permits in National Forests 187-188 



protection, need of legislation 42 



Water supplies from underground sources, studies 388 



Waterproofing, various materials, studies. Chemistry Bureau 213, 215-216 



Watersheds, forested, protection, cooperative work 193 



Weather Bureau — 



Chief, report, 1918... ._ 57-70 



printing and publications, 1918 66-67 



publications, 1918 293-294 



stations and observations, number and work, 1918 61-62 



Weeks — 



forestry-law operations, work of Solicitor's Office 395, 406 



law, land purchases 172 



Weevil — 



alfalfa, progress and control 238 



corn, black, destruction of stored corn 248 



sweet potato, eradication and control 241 



West Indies, weather stations, location 61 



Wheat- 

 acreage and production, 1918, comparison with previous years 5, 7 



insects injurious, control work 239-240, 248 



rust, black stem, relation to barberry plants 153 



storage investigations 471 



varieties, seed improvement 141-142 



Whitney, Milton, report as Chief, Bureau of Soils 225-232 



Wilt^. 



cotton, control by use of wilt resistant varieties 157 



tomato, control by resistant varieties 156-157 



WrLLiAMS, William M. , report as Solicitor. 393-424 



Wines, composition, study 219 



Wintering bees, investigations 252-253 



Wisconsin, hemp growing, increased acreage and production 162 



Wood, fuel use, increase 199 



Wool- 

 production, increase since 1914 6, 8 



reports, market news service 476 



Women, farm, demonstration and extension work 355, 366-367 



Wyoming, elk refuge, conditions, 1918 267-268 



Yellows, alfalfa, studies 155 



Zappone, a., report as Chief of Accounts and Disbursements Division, 1918. 277-279 



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