INDEX. 541 



Page. 



Chestnut trees, blight-resistant 158 



Children, feeding on milk, experiments 94 



Cholera — 



hog, control and investigations 74, 76, 118-119, 124-126 



hog, spread by insects, etc 125-126 



Cinchona alkaloids, identification method 227 



Citric acid, manufacture from citrus fruits 223-224 



Citrus — 



by-products, studies by Chemistry Bureau 223-224 



canker, eradication 176 



fruits, growing, varieties, pruning, bud -selection, etc 141, 142-144 



insects, California and Florida, investigations 260-261 



City- 

 market reporting service, work, 1919, location of offices 450-451 



marketing and distribution of foodstuffs, studies 430-431 



Climatology, work of Weather Bureau, 1919 64-66 



Clubs- 

 boys' and girls' , numbers, etc 353, 372-375, 383-384 



calf, pig, and poultry, work, 1919 82, 83, 89 



girls', enrollment and work 372-374, 383-384 



Coast Guard, cooperation with Weather Bureau in telegraphic work 62, 63 



Coconut press cake, nutritive value 220 



Codling moth, control work, cooperative 250-251 



Cold storage, foods, fish, etc 222, 431, 439, 453 



Cold storage. See also Storage. 

 Colorado — 



horse breeding work 86 



road projects approved, 1918, 1919 401, 403, 405, 407 



Colors, investigations - 231 



Comfort, Willis E., service and death during war 391 



Commerce, interstate, live stock, sanitary work 112-113 



Compsilura concinnata, introduction, value as parasite 265 



Concrete — 



investigations, Roads Bureau 422^23 



studies, war emergency work. Roads Bureau 393 



Conferences, work of Solicitor for various biureaus, etc 471 



Congressional distribution of publications, work, 1919 320 



Connecticut, road projects approved, 1918, 1919 401, 403, 405, 407 



Containers — 



food, investigations l^y Chemistry Bureau 230 



standard, act, enforcement — 



and results. . , 458 



by Solicitor, 1919 494 



Contests, milk 96 



Contracts, preparation by Solicitor _ 473 



Cookery, invest^tions, by Office of Home Economics 387 



Cooperation — 



Chemistiy Bureau, with other bureaus, etc 212,219,221,222,228,233-234 



Crop Estimates Bureau, with States, in statistical work 328-329 



Forest Service and live-stock associations 193 



Markets Biireau, with States, in marketing work 436-437 



rural, work of Markets Bureau 435-436 



Soils Bureau with other bureaus and departments 238-239, 240 



States Relations Service with other divisions, btireaus, etc 377-379, 386 



Cooperative — 



marketing associations 34 



purchasing and marketing, work of Markets Bureau 430 



Copper sulphate use in control of tapeworms in sheep 131 



Copra, nutritive value 220 



Com — 



acreage and production, 1919, and acreage and production, 1914-1919 4, 6, 7 



borer- 

 European, introduction, spread, and control 512-517, 529 



European, study and control 247-248 



growing, varieties testing 149-150 



plants, silage use, studies 99 



production, work of county agents, 1917, 1918, 1919 379-380 



