112 Proceedings of Boy al Society of Edinburgh. [sess. 
Hence, the maximum fatality from the five zymotic diseases under 
review occurs earlier in London than at Edinburgh by from two to 
nine weeks. The minimum death-rate also occurs earlier, except in 
the case of measles and diarrhoea, which are both a month later 
in London than in Edinburgh. The most noticeable feature in 
London, as compared with this city, is the very early date of the 
lowest death-rate from all causes — nine weeks earlier than in 
Edinburgh. This is clearly due to the great increase in infantile 
diarrhoea, which begins in London about the middle of June ; 
whereas in Edinburgh, deaths from this disease do not increase in 
a marked degree until about the end of July, and are so few in 
number that the general death-rate remains practically unaffected. 
