Preface to the Second Edition 
The reception of the first edition of the Laboratory Manual of General 
Agricultural Bacteriology has been very satisfactory. The issuing of a second 
edition, with such changes as may be considered necessary, is primarily for 
the needs of the authors’ classes. 
The plan of the book has not been materially changed, but more detail 
has been introduced into several of the exercises. These changes are con¬ 
sidered desirable because the laboratory time of the student has been in¬ 
creased considerably. 
It is hoped that others who have been using the manual will find the 
changes equally acceptable and adapted to their needs. 
University of Wisconsin THE AUTHORS. 
September, 1924. 
