The Iron Genie is a Harmonograph (pendulum sketcher) http://j.mp/XksHKZ on view at MHS Oxford http://j.mp/UO9nUE
— BibliOdyssey (@BibliOdyssey) July 31, 2014
from http://j.mp/1mudTSE
on: July 31, 2014 at 01:46PM
Link via @BibliOdyssey
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