64 LABORATORY BACTERIOLOGY 



EXERCISE XXVI 



CLEANING USED CULTURE TUBES, FLASKS, AND PETRI 

 DISHES 



97. Work for this Exercise. — Describe the bouillon cultures 

 made from the colonies on the agar plates (Exercise XXV). 

 Describe the bacteria in the stained cover-glass preparations, 

 and compare them with the bacteria in the preparations made 

 from the colonies. State fully in the laboratory report the 

 morphologic characters by which these genera are determined. 



Reject and clean all tubes and Petri dishes that have been 

 used for cultures. (See 3,/.) 



