Image: Evans' Hopper Boy
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Description: A diagram of Evans' 'hopper boy' and the automated bolting process, which appeared in the Young Mill-wright and Miller's Guide. This copy from the 1834 edition.
Title: Evans' Hopper Boy
Credit: The Young Mill-wright and Miller's Guide, 1834
Author: Oliver Evans
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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