1832.] brought down by the Ganges River. 239 



Middle. Side. 



20th August, .... 42 22 



7th Sept 19 15 



21st, 22 20 



4th Oct 9.6 5.1 



Average 23.1 15.5 



These numbers are to each other nearly as 3 to 2, so that Wfe 

 may correct the previous observations as follows : 



21st July 27.3 



2nd August 47.5 



13th 114.3 



The first rain fell on the afternoon of the 14th June, and we have 

 unfortunately no observation for the first month of their duration, but I 

 think 27.3, the quantity on the 21st July, would be rather a low than 

 a high average for it. For the second month, viz. from the 15th July 

 to the 15th August, we have three observations, which give an average of 

 63 grs. For the third month, we have two, with an average of 30.5 grs. 

 For the fourth month we have two, giving an average of 15.8. So that 

 the average for the whole period, from the 15th June to the 15th 

 October, would be 34 grs. On the 15th March, 1832, a quantity of 

 water taken in the middle of the stream gave 6 grains per quart: a 

 mean between this and 9.6 (the weight obtained on the 4th October), 

 or 7.8 grs., may be taken as the average from the 1 5th October to the 

 15th March, or for five months. 



1.084 per quart was the weight obtained on the 27th May, from 

 water taken at the side. If we correct this as before, it gives 1.63, 

 and the mean between this and 6, or 3.8 will be the average for the 

 remaining three months, from the 1 5th March to the 1 5th J a ne. 



I will here add such data as I possess respecting the breadth, depth, 

 and velocity of the stream. 



I found the breadth on the 15th March 1832, to be 660 yards. 

 The distance up the bank to the maximum height of the rains was 

 158 yards more on the southern shore, and 38 yards on the northern ; 

 which reduced to a level, would give a total breadth of 2563 feet, for 

 the maximum breadth of the rains; 1980 feet, being the least breadth 

 in the dry weather. 



On the same day, the total perpendicular fall from the maximum 

 height of the rains was 28 feet. The whole breadth of 1980 feet, 

 sounded at intervals of 300 feet, gave an average of 17 feet 8 inches, 

 which added to 28, gives 45 feet 8 inches for the maximum depth in the 



H h 2 



