272 



Ckolej'a in Relation to Certain Physical Phenomena. 



[part I. 



TABLE LVII. 



Th£ average Monthly Rainfall, Relative Humidity, Tem-perature, and the total Cholera 

 among the European and native troops and prisoners at Allahabad. 



Not only does the tendency to cholera decrease as we progress up the Gangetic 

 plains, but so also does the rainfall ; for it diminishes from 75 inches at Sagar Island 

 to 65 at Calcutta, 59 at Burdwan, 53 at Berhampore, 40 at Benares, and 37-5 at Allahabad, 

 or only half the amount that falls near the sea coast. As we have already seen, too 

 a larger and larger proportion of the annual average falls between June and September 

 whilst progressing in the same direction. The month of maximum cholera nearly 

 con-esponds with the month of maximum rainfall, the maximum of the latter falling 

 in July and of the former in August. 



The data regarding the average hygrometric condition of the atmosphere at this 

 station are very imperfect ; the figures obtainable, however, may serve as a rough guide. 

 According to these the month of maximum cholera corresponds with the month of 

 maximum relative humidity, but the humidity of the next maximum cholera month 

 (May) is less than half that of the other, and the month of minimum cholera corresponds 

 to a month of medium humidity. The maximum temperature corresponds with the 

 maximum month of spring-cholera (in May), but the temperature of the actual maxi- 

 mum cholera month for the annual period is 9 degrees lower. As usual, the 'minima 

 of temperature and cholera agree very nearly. 



(3) FyzabaD; 



It was remarked on a former page that cholera was nearly always present in one 

 or other of the cities of Oudh. The ancient capital (Adjudiah, on the banks of the 

 Grogra) is one of these, and is a place much frequented by pilgrims. The adjoining 

 town of Fyzabad (3 miles distant) is also believed to have more or less cholera constantly 

 present ; but as our statistics refer only to troops and prisoners in the latter station, 

 no comparisons can be instituted as to relative monthly prevalence in the district 

 beyond what the figures regarding these communities suggest. 



