28o 



Cholera in Relation to Certain Physical Phenomena. [part i. 



Here also it will be seen that July is the month of maximum cholera, August coming 

 next to it. The monthly water-level, rainfall and relative humidity are also given for the 

 same period. 



-Water-level nearest the surface. 



— Ditto farthest from the surface. 

 — 80 degrees Humidity. 

 -60 „ 



-20 „ 



— Lowest Rainfall. 



Monthly Water-level (in feet) [Ifi 

 months]. 



Humidity [dottal curve]. 

 Monthly Rainfall [16 months]. 



Total Cholera [16 months]. 



-Lowest Cholera. 



Diagram 18. — The monthly Water-level, Humidity, Rainfall and deaths from Cholera, from September 1875 to 



December 1876, at Jubbulpore. 



It will be seen in this illustrative chart, also, that the months of maximum humidity 

 correspond with the maximum of cholera ; but it will also be noted that cases occurred 

 when the humidity was at its minimum. 



(3) Raipore. 



"Water-level returns have been received from other stations in the Central Provinces, 

 but the cholera statistics regarding troops and prisoners are of too limited a character to 

 enable any deductions to be made from them as yet. The jail at the station of Raipore, 

 however, towards the eastern part of the province, has during a period of 22 years 

 furnished a total of 285 cases, and these will be found classified in the general tables 

 according to months and seasons. It is interesting to observe that here also August holds 

 the second place only as to cholera-prevalence, whereas July again holds the first. Raipore, 

 however, has a larger proportion of " spring " cases of cholera (January to May) than 

 Jubbulpore. 



(4) Nagpore. 



Nagpore, the chief town of the Central Provinces, situated " on the margin of a broad 

 plain of cotton soil," has not been included in our general tables, as no water-level 

 observations have been taken there, and the data regarding cholera among official 

 communities are very limited, the jail statistics alone being available. These have been 

 collected during 21 years, and an aggregate monthly record of 207 cases of cholera has 



