504 Proceedings of Royal Society of Edinburgh. [sess. 
Table A, No. 25), has a similar form to that seen in scarlet fever, 
while the other, the great epidemic in Maidstone in 1900,* due to 
the same cause, but followed by large numbers of secondary cases, 
Diagram XVIII. 
140 
i nr\ 
A 
f\ 
Scarlet 
Fever 
Cases. 
1 
\ZU 
100 
on 
$ \ 
h \ 
1 \ 
Halifax, 18 
ISO-1. 
OU 
60 
A n 
/ / 
/ 1 
It 
\\ 
\\ 
20 
\ 
. 
Nov. 20 De 
c. 4 Dec. 18 Ja 
1 
p. 1 Jan. 15 Ja 
n. 29 Feb. 12 f' 
eb.26 
is very asymmetrical, and takes the form of one of the chief 
exceptions to the conclusions arrived at (diagram XXI., Table A, 
No. 31). Two milk-spread epidemics of scarlet fever in Wimble- 
Diagram XIX. 
don f and Glasgow J have also been investigated (diagrams XXII. 
and XXIII., Table A, Nos. 29 and 30). In these it will befseen 
* Report, of Medical Officer of Local Government Board on Maidstone Epidemic, 
t Ibid . , 1886. + Special local Report on the Epidemic, by Dr J. B. Russell. 
