Tom blok Photo collection by Th.Schiöler Spiral scoops, screws and the chain pump The Archimedean screw Photo 151
The Archimedean screw
Gul streg
Photo 511 x 506 pixels, 43,6 K
 
Details of the Archimedean screw in Egypt
The screw as it is made in Egypt. The construction is an invention from the third century B.C.. This is correct as regards the main features but the steel crank is a modern invention. A treading man turned the ancient screw. See the next photo.
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