1874. ============+======+========+======+======+======+======+=============== Date at |Gauges| Dis- |Water |Trough| Dis- |Gauges| Date at Assuân. | at | charges| con- | of |charge| at | Cairo. | As- | at | sump-| Nile | at |Cairo.| | suân.| Assuân.| tion |Assuân|Cairo.| | | | |Assuân| to | | | | | | to |Cairo.| | | | | |Cairo.| | | | ------------+------+--------+------+------+------+------+--------------- August 5| 6·9 | 7600 |-1020 |-1000 | 5580| 5·8 |10th August. „ 10| 7·4 | 8600 | do | do | 6580| 6·4 |15th „ „ 15| 8·5 | 11500 | do | do | 9480| 7·8 |20th „ „ 20| 8·6 | 11800 | do | do | 9780| 7·9 |25th „ „ 25| 8·7 | 12100 | do | do | 10080| 8·1 |31st „ | | | | +------+------+--------------- „ 31| 8·7 | 12100 | do | do | 10080| 8·2 | 5th September. ------------+------+--------+------+------+ | | September 5| 9·0 | 12800 | do | do | 10780| 8·3 |10th „ „ 10| 8·8 | 11800 | do | 0 | 10780| 8·4 |15th „ „ 15| 8·7 | 11500 | do | +500 | 10980| 8·5 |20th „ „ 20| 8·4 | 10600 | do | do | 10080| 8·2 |25th „ „ 25| 8·4 | 10600 | do | do | 10080| 8·2 |30th „ | | | | +------+------+--------------- „ 30| 8·2 | 10050 | do | do | 9430| 7·9 | 5th October. ------------+------+--------+------+------+ | | October 5| 7·9 | 9300 | do | do | 8780| 7·6 |10th „ „ 10| 7·6 | 8600 | do | +700 | 8280| 7·4 |15th „ „ 15| 7·2 | 7800 | do | do | 7480| 7·0 |20th „ „ 20| 6·6 | 6600 | do | do | 6280| 6·3 |25th „ „ 25| 6·2 | 6000 | do | do | 5680| 5·9 |31st „ | | | | +------+------+--------------- „ 31| 5·6 | 5100 | do | do | 4780| 5·3 | 5th November. ------------+------+--------+------+------+ | | November 5| 5·2 | 4500 | do | do | 4780| 4·3 |10th „ ============+======+========+======+======+======+======+=============== TABLE LI.--_Calculated Cairo gauges corresponding to Assuân gauges if basin irrigation were to be changed into perennial irrigation._