REPORT 



OF THE 



Department of Bacteriology, 



R. S. Breed, Bacteriologist. 

 H. J. Conn, Associate Bacteriologist. 

 G. L. Reuhle, Assistant Bacteriologist. 

 J. D. Brew, Assistant Bacteriologists. 



TABLE OF CONTENTS. 



I. A comparison of the microscopical method and the plate 

 method of counting bacteria in milk. 



II. Cells in milk derived from the udder. 



III. Bacteria of frozen soil. 



IV. Culture media for use in the plate method of counting soil 



bacteria. 



[77] 



