PROCEEDINGS OF SECTION H. 675 
TABLE V. 
Showing amount of rainfall in years of high mortality :— 
meres Inches of Rain. 
1866 | 102°7 | 22°41 
1877 | 99:3 | 24-10 
1878 | 111°9 25°36 
1883 90°6 | 23-71 
| 
The years of exceptionally low mortality had thus, on the 
average, a rainfall of 28:17 inches, while in those marked by 
unusually high mortality the average was 23°89. The results 
obtained by these different methods of contrasting the conditions 
of different periods are not in very good account. Tables II. and 
III. apparently proving little or nothing either way, while tables 
IV. and V. rather support the view that a high mortality is 
associated with slight rainfall, and wzce versa. 
But the suggestion arises that there may be a fallacy in 
comparing the rainfall of the whole year with the mortality from 
typhoid, which is in large measure confined to less than one half 
of it. Ifthe prevalence of typhoid is dependent on the amount 
of rain at all, it seems probable that it should be influenced 
specially by the summer rainfall, and less by that of the winter 
months. I have, therefore, in the following tables presented 
together the mortality of the year, along with the rainfall of its 
first four months, January to April, and of the months of 
Novemier and December preceding. For the sake of contrast 
and comparison the four years of highest and lowest mortality 
are presented separately. 
Taste VI. 
Showing amount of summer rainfall in years of low mortality :— 
Mortality per Inches of Rain, Nov. 
100,000. to April. 
1872 49°7 | 1658 
1873 49°3 , | 18°62 
1879 46°1 | 1429 
1881 5571 | 7-03 
