CONTENTS. V 



Report of the Chemist — Continued. Page. 



Dairy products 222 



Beverages 223 



Citrus by-products 223 



Dehydration of fruits and vegetables 224 



Flour and cereals 225 



Grain mill, elevator, and cotton gin explosions and fires 226 



Drugsand pharmacology 227 



Plant chemistry 228 



Food flora, spoilage, and fermentation 229 



Insecticides and fungicides 230 



Containers 230 



Color investigations 231 



Leather and tanning 232 



Naval stores 232 



Paper and fabrics 233 



Methods and apparatus 233 



Analytical work for other departments 233 



Report of the Chief of the Bureau of Soils 235 



Soil survey 235 



Chemical investigations 239 



Fertilizer resources investigations 240 



Soil physics 245 



Report of the Entomologist 247 



Cereal and forage crop insect investigations 247 



Stored-product insect investigations 249 



Deciduous fruit insect investigations 250 



Investigations of insects injurious to vegetable and truck crops 255 



Investigations of insects affecting forest resources 258 



Tropical and subtropical fruit insect investigations 260 



Work on the gipsy moth and brow-n-tail moth 263 



Extension and demonstration work 266 



Southern field-crop insect investigations 267 



Insects affecting the health of man and animals 269 



Bee culture investigations 269 



General summary of the war activities of the Bureau 272 



Report of Chief of Bureau of Biological Survey 275 



Work of the Bureau of Biological Survey 275 



Economic investigations 275 



Biological investigations 288 



Mammal and bird reservations 290 



The migratory-bird treaty and Lacey Acts 293 



Report of the Chief of the Division of Accounts and Disbursements 299 



Character of work 299 



Work of the year 299 



Report of the Chief of the Division of Publications 303 



Summary 303 



Facilitating printing 804 



Prompt handling of proof 304 



Appropriation for printing 305 



Expenditures for printing and binding 306 



Statistics of the publication work 311 



