iv A MANUAL OF BACTERIOLOGY 



The section on soil bacteria lias been read by Dr. J. G. Lip- 

 man, Director of the New Jersey Experiment Station. That on 

 the bacteria of milk has been read by Professor E. G. Hastings, 

 of the University of Wisconsin. My colleague, Dr. E. B. Fred, 

 has prepared portions of the appendixes and given many valuable 

 suggestions throughout the work. Mr. C. H. Crabill has aided 

 greatly in the preparation of the illustrations. 



In the preparation of the material, frequent use has been made 

 of the manuals of Lohnis, Eyre, Frost, Heinemann, Abel, Russell 

 and Hastings, Muir and Ritchie, and others, to which acknowl- 

 edgment is due. 



HOWARD S. REED 



