Image: Six Mechanical Powers
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Description: The six simple machines.
Title: Six Mechanical Powers
Credit: The American educator; completely remodelled and rewritten from original text of the New practical reference library, with new plans and additional material (1919), Vol. 5, pg. 2290.
Author: Foster, Ellsworth D., ed; Hughes, James L. (James Laughlin)
Usage Terms: Public domain
License: Public domain
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