Report on the Bacteriology of Water. 453 



As regards the effect of the higher or lower temperature at which 

 the waters were maintained, it appeared throughout the greater part 

 of the time that the typhoid bacilli in the flask, kept at the summer 

 temperature (19 C.), suffered more rapid degeneration than those in 

 the water, which was preserved at the winter temperature of 6 C., 

 although quite at the last this relationship was reversed. 



It is interesting to contrast, with the above results, the behaviour 

 of the B. coli comimmis placed under precisely similar conditions in 

 the same water and over the same period of time. The results of 

 this comparative investigation are recorded in the following table : 



