The people sow their crops as soon as the floods subside. Harvest comes on within a few months, and unless they have some means of irrigation, in addition to the Nile floods, they must wait until the following year before they can plant again. With a dam like the one at Aswan, the water supply can be so regulated that they can grow crops all the year round. This is already the condition in a great part of the delta, and it is planned to make the same true of the farms of Upper Egypt. As for methods of raising the water from the river and canals and from one level to another, they vary from the most modern of steam pumps and windmills to the clumsy _sakieh_ and _shadoof_, which are as old as Egypt itself. All the large land owners are now using steam pumps. There are many estates, owned by syndicates, which are irrigated by this means, and there are men who are buying portable engines and pumps and hiring them out to the smaller farmers in much the same way that threshing machines are rented in the United States and Canada. Quite a number of American windmills are already installed. Indeed, it seems to me almost the whole pumping of the Nile valley might be done by the wind. The breezes from the desert as strong as those from the sea sweep across the valley with such regularity that wind pumps could be relied upon to do efficient work. At present, however, water is raised in Egypt mostly by its cheap man power or by animals. Millions of gallons are lifted by the _shadoof_. This is a long pole balanced on a support. From one end of the pole hangs a bucket, and from the other a heavy weight of clay or stone, about equal to the weight of the bucket when it is full of water. A man pulls the bucket down into the water, and by the help of the weight on the other end, raises it and empties it into a canal higher up. He does this all day long for a few cents, and it is estimated that he can in ten days lift enough water to irrigate an acre of corn or cotton. At this rate there is no doubt it could be done much cheaper by pumps. Another rude irrigation machine found throughout the Nile valley from Alexandria to Khartum is the _sakieh_, which is operated by a blindfolded bullock, buffalo, donkey, or camel. It consists of a vertical wheel with a string of buckets attached to its rim. As the wheel turns round in the water the buckets dip and fill, and as it comes up they discharge their contents into a canal. This vertical wheel is moved by another wheel set horizontally, the two running in cogs, and the latter being turned by some beast of burden. There is usually a boy, a girl, or an old man, who sits on the shaft and drives the animal round.