CONTENTS. V 



Report of the Acting Chief of the Bureau of Plant Industry — Continued. Page. 



Crop utilization 150 



Plant pathological investigations 153 



Plant physiological investigations 158 



New crop plants and crop extension 161 



Report of the Forester 165 



The forest service in war times 165 



The National Forests 166 



Cooperation with States 193 



War research work 193 



Miscellaneous 200 



Report of the Chemist 201 



Enforcement of the food and drugs act 202 



Conservation of foodstuffs 208 



Demonstration 209 



Cooperation with war agencies 211 



Technological investigations 214 



Research 217 



Collaboration 223 



Report of the Chief of the Bureau of Soils 225 



Soil Survey 225 



Chemical investigations 230 



Fertilizer resources investigations 230 



Soil physics 232 



Report of the Entomologist 233 



Deciduous-fruit insect investigations 233 



Cereal and forage insect investigations 237 



Stored product insect investigations 240 



Investigations of insects injurious to vegetable and truck crops 240 



Southern field-crop insect investigations 243 



Insects affecting the health of man and animals 243 



Investigations of insects affecting forest resources 244 



Tropical and subtropical fruit insect investigations 245 



Extension and demonstration work 247 



War emergency entomological intelligence service 249 



Bee-culture investigations 250 



Work on the gipsy moth and brown-tail moth 253 



Report of Chief of Bureau of Biological Survey 257 



Work of the Biu-eau of Biological Survey 257 



Economic investigations 257 



Biological investigations 265 



Mammal and bird reservations 266 



Interstate commerce in game 271 



Federal migratory bird law 273 



Report of the Chief of the Division of Accounts and Disbursements 277 



Character of work 277 



Work of the year 277 



Report of the Chief of the Division of Publications 281 



Summary of publications 281 



Allotments and expenditures 282 



Statistics of the publication work 287 



Farmers' Bulletins 288 



Publications relating to food production and conservation 291 



Publication work of the Weather Bureau 293 



Sales of Department publications 294 



Work of the division by branches 295 



