2«2 



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



According to these combined cholera statistics August again maintains its position, a 

 sudden rise in prevalence of the disease being observed, followed by a more gradual fall. 

 The month 'of maximum rainfall immediately precedes the maximum cholera month, as 

 also does th^ rriaximum humidity. The monthly maximum temperature, however, precedes 

 the maximum cholera by 3 months, and exceeds the mean temperature of August by 

 nearly I5''1iegrees. The maximum cholera corresponds nearly with the minimum 'pressure 

 and the maximum pressure very nearly with the minimum cholera. 



(c) Selected Stations in the Punjab. 



, ■/ (1) Mean Meer and Lahore. 



We Have selected three stations in the Punjab, or rather two — Lahore and Mean 

 Meer having been brought together. Mean Meer is the military station of Lahore, about 

 6 miles to the south-west of it and on higher ground. The cholera returns for the former 

 extend over 25 years, and for the latter over 31, and furnish a total of 2,638. 



TABLE LXVL 



The average Monthly Rainfall, Relative Humidity, Temperature and Pressure at 

 Lahore, together with the total Cholera registered among the European and 

 Native Troops and Prisoners at Lahore and Mean Meer. 



It will be observed that August again stands prominently forward as the month 

 pre-eminently adapted for cholera in these provinces, nearly 2,000 of the 2,600 odd cases 

 having' occurred in this month, the maximum both in Lahore and Mean Meer taking 

 place in the same month. 



The proportion of rainfall from January to May continues to augment as we proceed 

 towards the frontier. At Meerut it was seen to be 12 "2 per cent, of the total, and here 



