1889 41·17 ·44 1890 42·00 ·83 1891 42·78 ·78 1892 43·32 ·54 ---- Total fall from 1st March, 1885, to 1st March, 1892 3·52 metres ---- Yearly average ·50 nearly. There are no records of the level of the lake previous to 1885. Linant Pasha states in his ‘Mémoires’ that Vansleb, who was in the Fayûm in 1673, said that one embarked at Sanhûr to pass to the other side of the lake. Dead tamarisk bushes standing in the water seem to prove that the lake has in the past been lower by a metre or more than it is at present, for these tamarisks grow along the margin of the lake above the water edge, but not in it. The fall of the lake is not continuous throughout the year, but generally takes place from the 1st March to the 31st October; the level rises from the 1st November to the end of January, and remains stationary during February. If the area of the lake were more accurately determined, there are several problems of interest connected with evaporation and the “duty” of water which might be calculated out from the facts known about the fall of this lake, the level of which is recorded daily. The discharge entering the Fayûm throughout the year is known, as also approximately the areas under crop; but while the area of the lake remains so vaguely guessed at, the results of the calculation would be of little value, as the figure representing the lake area is an important factor in the calculations. But the following figures give a measure of what the daily evaporation is in June and July, at least approximately:— In 1889 and 1890, when there were exceptionally short summer supplies, and the drainage into Lake Qurûn must have been as little as it ever is, the lake levels were as follow:—