A TEXT-BOOK 



OF 



GENERAL BACTERIOLOGY 



BY 



WILLIAM DODGE FROST 



ASSOCIATE PROFESSOR OF BACTE^&LOGY IN THE UNIVERSITY 

 OF WISCWiSIN 



AND 



EUGENE FRANKLIN McCAMPBELL 



PROFESSOR OF BACTERIOLOGY IN TH OHIO 

 j STATE UNIVERSITY 



ILLUSTRATED 



gorfc 

 THE MACMILLAN COMPANY 



1911 



All rights reserved 



