.@evelynjlamb's post on Dürer’s techniques reminded me of this Drawing Board invention (Oct 2, 1847 issue of @sciam) pic.twitter.com/f3bcNJ3U16

— Jen Christiansen (@ChristiansenJen) April 7, 2014

from http://twitter.com/ChristiansenJen
on: April 07, 2014 at 02:33PM