PREFACE vii 



advanced work has been added with the object of making 

 them easily accessible to those engaged in advanced work. 

 The laboratory guides of Novy, Eyre, Frost, Gorham, 

 Kanthack and Drysdale, and Connell, and the American 

 edition of the Manual of Bacteriology of Muir and Ritchie, 

 have been freely consulted. I take this occasion of 

 expressing my deep gratitude to Professor Edwin O. 

 Jordan and Dr. Norman Mac Leod Harris for their 

 invaluable help and suggestions in the preparation of 

 this guide. 



Paul G. Heinemann. 

 Chicago, III. 

 June, 1905. 



