APPENDIX. 467 



Brought forward, 1,46,188. 



Captain Bedford gives the discharge of the Dihong, at the same season 

 of the year, fifty-six thousand five hundred and sixty-four feet, but the small 

 rivulet, called the Lali, is here included, say 56,000 



Remain Cubic feet, 90,188 



Here then is proof, in an instance of the fact, that in a country (and climate) similar to 

 Asam,* of the extent of 153 square degrees, a river of such importance as one discharg- 

 ing, when at the lowest ebb, ninety thousand cubic feet per second, may have its origin. 



Rennell has stated the entire discharge of the Ganges, in the dry season, at eighty 

 thousand cubic feet ; but he has perhaps overrated it since the quantity of water flowing 

 past the City of Benares in April last, was found to be no more than sixteen thousand f or 

 seventeen thousand feet per second. 



But the whole extent drained by the Irawadi, including its several contributors down 

 to the head of the Delta, or to the point where it remains an undivided stream, is thirty- 

 three square degrees : it follows that, without claiming a larger space for the origin of the 

 Irawadi than what appears due to it from the result of my researches, the probability is 

 in favor of its discharging in the vicinity of Prome, in the dry season, upwards of one lack 

 and eighty thousand cubic feet per second, or that it is there larger by one-fourth than the 

 Brahmaputra at Goalpara. 



I regret that I want data for continuing the comparison through the rainy season. 

 Tiie only fact that I can state, connected with a rise in the Brahmaputra, is, that on the 

 2d May, 1825, when a considerable extent of its sands yet remained uncovered, it discharged 

 three lacks and seventy-five thousand cubic feet per second, above the mouth of the Dikho 

 river, to which must be added (say) forty thousand feet, for the Bori Lohit, which sepa- 

 rates from the main stream a few miles up the river. 



The objection has been made that the Sanpo, where it is lost in Thibet, is necessarily 

 a very large river, and on the other hand, that the Dihong, where I last saw it within the 



* And the contiguous territories. 



t For this information, I am indebted to the kindness of J. Prinsep, Esq. 



