Archimedes' screw pipe does not need to be perfectly watertight, as long as the amount of water being scooped with each turn is large compared to the amount of water leaking out of each section of the screw per turn. If water from one section leaks into the next lower one, it will be transferred upwards by the next segment of the screw. In some designs, the screw is fused to the casing and they both rotate together, instead of the screw turning within a stationary casing. The screw could be sealed to the casing with pitch resin or other adhesive, or
Montes Archimedes Montes Archimedes Montes Archimedes is a mountain range on the Moon. It is named after the crater Archimedes that lies to the north, which in turn is an eponym of the Greek mathematician Archimedes. This group of mountains is located on a plateau in the eastern part of the Mare Imbrium, a lunar mare in the northwest quadrant of the Moon's near side. They are bounded on the eastern side by the Palus Putredinis, a small mare, and to the north by Archimedes. Farther to the south and east lies the impressive Montes Apenninus, a long mountain range. The selenographic