522 Profs. Percy Frankland and Marshall Ward. 



Typhoid- infected Steam-sterilised Thames Water (16.1.1894). 



As usual, then, in the steam-sterilised water, the typhoid bacilli 

 underwent a gradual decline, the slight increase on 22.1.1894 being, 

 in my opinion, not attributable to real multiplication, but to other 

 causes as indicated above. The typhoid bacilli were still abundantly 

 present thirty-nine days after their first introduction. I attribute 

 this greater longevity in this series of experiments partly to the fact 

 that the typhoid bacilli were initially introduced in such large num- 

 bers, and partly to their doubtless being in a very vigorous condition, 

 having been taken from colonies selected for their size, and only five 

 days old at the time. 



