506 INDEX. 



Dairying — - Page. 



community development 88-89 



demonstration work on reclamation projects 149 



Date palm, physiological requirements, climate and soil 160 



Dauhentonia longi/olid, toxic properties 118 



Daylight saving law, relation to work of Weather Bureau 58 



Dehydration. See Drying. 

 Demonstration farm — 



county agents. South, North, and West 354, 360, 366 



Entomology Bureau 247-249 



Hawaii, results 348 



reclamation project 148-150 



Southern States. ._ _. 499 



Derris, use as insecticide, investigations 235 



Dietary survey, cooperative work of Home Economics 369-371 



Dips, animal, examination 120-121 



animal, investigations and control work, 1918. .... 115-120, 121, 122-126, 127-131 



bees, investigations 253 



plant, investigations 153-158 



Disinfection — 



cars from Mexico in quarantine service 28 



hides, methods 121 



Document Section, Publications Division, work, 1918 301-304 



Document Superintendent, sales of Department publications 294-295 



Dourine, eradication, progress 107-108, 113 



Drainage — 



investigations, 1918 388-390 



systems, results of county agents' extension work 363 



Drought — 



1918, effects in Southern States 354-355 



resistance of crops 159 



Drugs — 



adulteration and substitution, control work 206, 208, 221 



imports, substitutes and adulteration 208 



Dry farming. Great Plains, cooperative work, 1918 145 



Drying- 

 fruits and vegetables, work of Chemistry Bureau 209, 213 



leaf tobacco, patent process for public use 156 



Ducks, wild, damages to rice 264 



Dugaldia hoopesii, cause of spewing sickness of sheep 118 



Dust- 

 explosions, mills and elevators, control work 211, 214 



insecticides, experiments 234, 236, 243 



preventives, research by Roads Bureau , . .' 385 



Dyes, certification, and preparation, work of Chemistry Bureau 206, 213, 215 



Earworm, resistance, corn breeding 139-140 



Economics, home, work, 1918 369-371 



Editorial work — 



Publications Division, 1918 295-296 



States Relations Service 338-339 



Education, agricultural, in schools, investigations, States Relatione Service. - 339-341 



Eggs- 

 frozen, judging methods 220 



handling, work of Chemistry Bureau 210 



preservation, increase 79 



production, increase since 1914 6, 8 



substitutes, examination 205 



Elevators, dust explosions and fires, control work 211 



Elk, conditions on game reservations, numbers, and feeding methods 267-268 



Emergency — 



food production, activities of Department 52-53 



traffic and storage, assistance of Markets Bureau 480 



war- 

 entomological intelligence service 249-250 



food use, instruction courses 371 



