[17]“Bull. of the American Geographical Society, 1882, pp. 22 and 24.”
[18]Mémoires sur les travaux publics en Egypte, Paris, 1873, pp. 53, 54.
[19]G. A. Liernur, Col. Western and Col. Sir C. C. Scott Moncrieff, k.c.m.g. Notes on the Wadi Rayan, Cairo, 1888.
[20]Note on the Wadi Rayan Project, Cairo, 1889.
[21]Perennial Irrigation and Flood Protection in Egypt, by W. Willcocks, m.i.c.e. Dir. Gen. of Reservoirs, with A Note by W. E. Garstin, Under Secretary of State, P.W.M., Cairo, 1894.
[22]The engineering details of the Wadi Rayan reservoir project have since been more fully discussed by Sir William Garstin in his “Report on the Basin of the Upper Nile” Cairo, (pp. 6-9 Appendix I).
[23]A Note by Dr. Schweinfurth on the Salt in the Wadi Rayan: an appendix to Perennial Irrigation, etc.
[24]The Assuan Reservoir and Lake Moeris, London, 1904.
[25]The following analyses of the chief springs in the Wadi Rayan, made by Mr. Lucas, Chemist to the Survey Department, are of interest:—
| North Spring. | South Spring. | East Spring. | |
|---|---|---|---|
| Matter In Solution | 398·8 | 350·8 | 811·6 |
| Chlorine calculated as Sodium Chloride | 278·4 | 238·2 | 585·5 |
| Sulphur Trioxide calculated as Sodium Sulphate | 62·9 | 53·9 | 126·2 |