Report on the Bacteriology of Water. 



553 



considerable diminution in numbers on the day following their introduc- 

 tion ; after two days the numbers had still further diminished, whilst five 

 days after introduction they were no longer discoverable at all. The fate 

 of the anthrax bacilli in the Dundee water was quite similar, their dis- 

 appearance being, however, a little less rapid; thus a few bacilli were still 

 present in one of the two tubes on the fifth day after infection. 



The following table exhibits the results obtained with the same 

 waters kept at 13 C. : 



Water kept at 13 C. 



Thus at the higher temperature of 13 C., the anthrax bacilli were 

 markedly more persistent than at 5 C-, although they had in all cases 



