============+=======================+======================= Date. | 1892 | 1877 +-------+-------+-------+-------+-------+------- |Assuan.| Cairo | Cairo |Assuan.| Cairo | Cairo | | with | with | | with | with | | basin | peren-| | basin | peren- | | irri- | nial | | irri- | nial | |gation.| irri- | |gation.| irri- | | |gation.| | |gation. ------------+-------+-------+-------+-------+-------+------- August 5| 6·3 | .. | .. | 4·9 | .. | .. 10| 6·8 | 5·3 | 5·1 | 5·4 | 4·0 | 3·9 15| 6·7 | 5·8 | 5·8 | 5·8 | 4·7 | 4·6 20| 7·4 | 5·4 | 6·2 | 6·4 | 4·6 | 5·0 25| 8·3 | 5·8 | 6·5 | 6·1 | 5·3 | 5·5 31| 8·3 | 6·6 | 7·7 | 6·2 | 5·3 | 5·6 ------------+-------+-------+-------+-------+-------+------- September 5| 8·6 | 6·9 | 7·7 | 6·3 | 5·2 | 5·2 10| 8·8 | 7·1 | 8·0 | 6·1 | 5·3 | 5·3 15| 8·8 | 7·5 | 8·3 | 6·0 | 5·2 | 5·5 20| 8·9 | 7·9 | 8·3 | 6·0 | 5·2 | 5·4 25| 8·6 | 8·1 | 8·4 | 6·3 | 5·1 | 5·4 30| 8·4 | 8·3 | 8·4 | 6·1 | 5·3 | 5·6 ------------+-------+-------+-------+-------+-------+------- October 5| 8·2 | 8·4 | 8·3 | 5·6 | 5·2 | 5·4 10| 7·8 | 8·3 | 8·1 | 5·2 | 5·0 | 5·0 15| 7·4 | 8·1 | 7·7 | 4·9 | 4·9 | 4·6 20| 7·2 | 7·9 | 7·2 | 4·6 | 4·6 | 4·4 25| 6·8 | 7·9 | 7·0 | 4·5 | 4·4 | 4·0 31| 6·3 | 7·8 | 6·6 | 4·0 | 4·2 | 3·9 ============+=======+=======+=======+=======+=======+======= To enable one to compare these figures which are in metres and referred to mean low water level, with the gauges as recorded at present, I add the following table:--