Archimedean Screws
by Universal History Archive/uig
Title
Archimedean Screws
Artist
Universal History Archive/uig
Medium
Photograph - Photograph
Description
Archimedean Screws for raising water from one level to another. The 'thread' could be either external (as in Fig. 3), or the more conventional internal spiral in Fig. 2. From Ferguson's Lectures edited David Brewster, Edinburgh, 1805
Uploaded
July 7th, 2016
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