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ARCHIMEDES, SCREW OF

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Originally appearing in Volume V02, Page 369 of the 1911 Encyclopedia Britannica.
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See also:

ARCHIMEDES, See also:SCREW OF , a See also:machine for raising See also:water, said to have been invented by Archimedes, for the purpose of removing water from the hold of a large See also:ship that had been built by See also:King See also:Hiero II. of See also:Syracuse. It consists of a water-tight See also:cylinder, enclosing a chamber walled off by See also:spiral divisions See also:running from end to end, inclined to the See also:horizon, with its See also:lower open end placed in the water to be raised. The water, while occupying the lowest portion in each successive See also:division of the spiral chamber, is lifted mechanically by the turning of the machine. Other forms have the spiral revolving See also:free in a fixed cylinder, or consist simply of a See also:tube See also:wound spirally about a cylindrical See also:axis. The same principle is sometimes used in See also:machines for handling See also:wheat, &c. (see See also:CONVEYORS).

End of Article: ARCHIMEDES, SCREW OF

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ARCHIMEDES (c. 287–212 B.C.)
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