270 
Scientific Proceedings, Royal Dublin Society. 
Substituting for a its value, we obtain the following Table :— 
Linear Dimension of Nile, at Cairo, ir 1799-1801, 
. September, 
October, 
November, 
December, 
. January, . 
. Febuary, . 
DOP oo bo 
ls 
12. 
h. 
. Marek, 7. Pe 
. April, 102 
. May, 88 
. June, 87 
July, 103 
August, . 174 
Form (3), and the preceding Table, we find 
h~N3 
Q=678( 
Calculating by this formula, I find 
(9) 
Water-discharge of Nile, at Cairo, in 1799-1801, expressed vn 
Cubic Meters per Second. 
. September, . 
. October, i 
. November, . 
December, 
January, . 
. February, 
Or SUS 99 bo 
Total mean discharge = 
—> 
* Talabot’s elaborate estimate, which was adopted by Sir John 
cubic feet per second. 
oe: 
| 02c 
7 
7,062 8 
4,882 9 
3,406 | 10. 
Dope Bies if = Tih 
1,824 | 12 
40,411 
12 
Q. 
. March, - 1,408 
ve Apraltys . 1,093 
. May, . 702 
. June, . - 678 
. July, . . S26 
. August, . . 5,424 
3,367 cubic meters per secon 
4,404:108 cubic yards per second 
* 118,900 cubic feet per second* 
25-49 cubic miles per annum. 
Herschel, is 101,000 
