Report on the Bacteriology of Water. 



253 



Experiments to test the Influence of Temperature on the Changes under- 

 gone hy the Normal Bacteria of Standing Thames Water. 



To determine whether the effect of temperature on the increase of 

 the bacteria of standing Thames water is very marked, the experi- 

 ments summarised in Table x were carried out. 



Two 1-litre flasks of the water were collected and at once carefully 

 analysed, with the result that the Thames water collected on De- 

 cember 10 contained, on the average, 1065 bacteria per 1 c.c. 



The flasks were then placed in the dark, one at 12° C, the other at 

 20° C, and examined periodically, with the results tabulated. 



The column of remarks sufficiently denotes the behaviour noticed. 



