CONTENTS. 



Part I. 



PAGE 



Officers and staff, ........... la 



Report of the director, .......... 4a 



Report of the treasurer, . . . . . . . . . .11a 



Report of the department of botany, ....... 13a 



Report of the department of chemistry, ....... 18a 



Research section, ........... 18a 



Fertilizer section, .......... 20a 



Feed and dairy section, . . . . . . . . . 23a 



Numerical summary of general laboratory work, .... 30a 



Report of the department of entomology, ....... 31a 



Report of the poultry department, ........ 38a 



Report of the department of microbiology, ...... 40a 



Report of the department of veterinary science, ..... 43a 



Poultry disease elimination, ........ 43a 



Hog cholera investigations, ........ 46a 



Incomplete studies, .......... 46a 



New investigations, ......... 47a 



Part II. 



Bulletin No. 189, The European corn borer and its control, ... 1 



Bulletin No. 190, The propagation of apple trees on their own roots, . . 73 



Bulletin No. 191, Practical results from studies on egg production, . . 97 



Bulletin No. 192, Seventh report of the cranberry substation, . . . 105 

 Bulletin No. 193, Supply and distribution of Connecticut valley cigar leaf 



tobacco, ............ 143 



Bulletin No. 194, A fertilizer experiment with asparagus, .... 231 



