PAGE. I. Plan of the Nile Valley 12 II. Longitudinal Section of the Nile Valley 14 III. Outlet of Lake Victoria 26 IV. Cross sections of the Nile and its tributaries (1) 28 V. Gauge diagrams of Lakes Victoria and Albert 30 VI. The Sudd region 34 VII. Outlet of Tsana Lake 44 VIII. Gauge diagrams of the White and Blue Niles at Khartoum 46 IX. Cross sections of the Nile and its tributaries (2) 42 X. Longitudinal section of the Nile: Wady Halfa to Assuân 48 XI. Cross sections of the Nile and its tributaries (3) 52 XII. Longitudinal section of the Nile: Assuân to Cairo 50 XIII. Typical cross sections of the Nile Valley 50 XIV. Plan of typical basin irrigation in Egypt 66 XV. Plan of the Fayoum and the Wady Rayan 76 XVI. Longitudinal section of the Fayoum and the Wady Rayan 80 XVII. „ „ „ Rosetta Branch 54 XVIII. „ „ „ Damietta Branch 54 XIX. Plan of typical perennial irrigation in Egypt 68 XX. Possible tunnel at Lake Tsana 103 XXI. The Egyptian oases 108 THE NILE IN 1904. CHAPTER I. The Nile.