Image: Cymagraph Willis 1842
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Description: Willis' Cymograph, an instrument for copying architectural mouldings. From: Willis, Robert (1842). "Description of the Cymagraph for Copying Mouldings". Civil Engineer and Architects' Journal 5: 219-221.
Title: Cymagraph Willis 1842
Credit: http://robertwillis2016.org/Library/
Author: Willis, Robert, 1800-1875
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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