PREFACE 



This publication is the outgrowth of work done for 

 the Indiana profession, having its origin in a series of 

 papers upon the progress of bacteriology presented, 

 by request, to the State IVIedical Society between the 

 years 1890 and 189Y. 



These papers cover much of the time during which 

 the germ theory of disease was working its way into 

 the convictions of the profession, and it is with some 

 little pride that the author is enabled to feel that of 

 this progress he has been a part. 



Presented under the special conditions indicated, 

 and in serial form, they have something of a historical 

 character and meaning which, even at the expense of 

 some repetitions, has been in large measure preserved. 



To these have been added several, partly new, 

 partly prepared for the students of the Medical Col- 

 lege of Indiana or for various medical gatherings. 



