638 



LABORATORY EXERCISES 



The Society of American Bacteriologists has endorsed a brief characterization 

 as a part of the descriptive chart which it has published. This brief description is 

 useful in a comparative study of different microorganisms. 



BRIEF CHARACTERIZATION 



Mark + or o, and when two terms occur on a line, erase the one which does not 

 apply, unless both apply. 



■Additions to the original chart of the Society of American Bacteriologists. 



