PART I.] Cholera-history of Peshawur in Relation to Monthly Rainfall. 283 



it is 18*9. The proportion of cholera, however, during these months does not appear to 

 augment at the same rate. 



The mean relative humidity of the atmosphere at Lahore is all the year round 

 very low, and here it is the highest degree of humidity but one, and not the 

 highest, that corresponds with the maximum cholera months. The highest humidity, 

 so far as our data go, appears to correspond with one of the months of minimum 

 cholera. 



The month of lowest mean pressure here also corresponds very nearly with the 

 month of maximum cholera, and the high pressure months with the months of 

 minimum cholera. As at Meerut, the temperature of June is higher than that of 

 May, and is higher than the temperature of the month of maximum cholera by 

 5°-6. 



(2) Peshawur. 



We select one more station, that of Peshawur, in the trans-Indus territory of 

 the Punjab. It is a large frontier military station situated in a valley, about 50 

 miles in length by 40 in breadth, traversed by three tributaries of the Indus. 



TABLE LXVII. 



Tfte average Monthly Rainfall and the total Cholera registered among European and, 

 Native Troops and Prisoners at Peshawur. 



Unfortunately we have not been able to obtain any very satisfactory meteoro- 

 logical data regarding this station, so that the table merely gives the mean monthly 

 rainfall, and the monthly cholera — the figures representing the latter extending over 

 a period of 28 years. The total rainfall of the year is not quite 13 inches, and 

 nearly half of the total falls in the earlier months of the year. The cholera statistics 

 also indicate that the disease is not distributed over the annual period in the same 

 proportion as in the non-endemic area generally, for 40 per cent, of the total cholera 

 at Peshawur has occurred at other than the ordinary rainy season of the great part 

 of the North-West and Lower Provinces, viz., June to September. 



