73 



B. enteritidis where one form, indistinguishable from the others by any 

 morphological, cultural or agglutination characters was singled out neverthe- 

 less by this delicate affinity of the violet dye. The observation, he states, 

 is an isolated one, but my experience with this colon culture seems to confirm 

 the fineness of this selective affinity. 



Although my work is too meagre to warrant any definite conclusions, yet 

 it seems to be suggestive, at least, of the value of selective bactericidal or 

 bacteriostatic dyes as valuable adjuncts in sanitary bacteriological analysis. 



