Index No.* 



BRIEF CHARACTERIZATION 



As each of the following characteristics is determined, indicate in proper marginal square by 

 means of figure, as designated below: 



* Recording the "Index Number" here is optional ; but its use will be found 

 convenient if the charts are to be filed according to the salisnt characteristics of the 

 organisms. The Index Number consists of the firtt thirteen figures from the margin 

 (primary characteristics) copied down in the order of their occurrence in the margin, 

 placing a dash wherever a heavy rule occurs in the margin. Thus, B. coli belongs to 

 the group 5312-41220-1111. 



