Archimedes' Screw

Have you seen marbles moving up the screw? Well, we did saw it through Archimedes’ screw. At each turn of the screw, it’s lower end scoops up the returning marbles. These marbles become trapped in the spaces between the screw thread. With the continuous turning of the screw, marbles slide up the length of the screw and exit a hole near the upper end of the plastic tube. Then, each marble rolls down a loping frame with guiding pins. They enter the lower hole for their return and the cycle is repeated.
This screw is historically used for transferring water from a low-lying body of water into irrigation ditches in the Nile delta in Egypt and for pumping out water from ships. It is named after its inventor, the Greek mathematician and physicist Archimedes (237-212 BC.).