rV CONTENTS. 



Report of the Chief of the Weather Bureau Continued. Page. 



Library 70 



Investigations in solar radiation 71 



Investigations in seismology 71 



Report of the Chief of the Bureau of Animal Industry 73 



Activities receiving special attention 73 



Animal husbandry division 79 



Dairy division 90 



Meat inspection division 101 



Quarantine division 108 



Field inspection division 110 



Tick eradication division , 113 



Tuberculosis eradication division 115 



Division of hog-cholera control 118 



Pathological division 119 



Biochemic division 124 



Zoological division 130 



Miscellaneous division 132 



Office of virus serum control 134 



Experiment station 134 



Report of the Chief of the Bureau of Plant Industry 137 



Work and organization of the Bureau , 137 



Agronomic and horticultural investigations 138 



Plant breeding 150 



New crop plants and crop extension 152 



Forage crops 157 



Seeking new crop plants abroad 157 



Crop utilization 159 



Investigations of seed supplies 161 



Congressional seed distribution 164 



New and rare field-seed distribution 164 



Soil fertility investigations 164 



Plant physiological investigations 168 



Cereal pathology 168 



Crop diseases - 172 



Spray mixtures for citrous trees 174 



Nematode infestation of clover seed 174 



White-pine blister rust 175 



Citrus canker eradication 176 



Report of the Forester .' 177 



The extension of forestry practice .' 177 



Personnel changes in the Forest Service 179 



The National Forests 181 



Cooperation with States 203 



Research 204 



Miscellaneous 210 



Report of the Chemist. 211 



Enforcement of the food and drugs act. 212 



Sugars, sugar derivatives, sirup 218 



Fats and oils 219 



Chemistry and nutritive value of proteins 220 



Seafoods 221 



Poultry and eggs 222 



