Published at 868 × 559 in Photo Friday: Hecker Bros. Traveling Medicine Show
These drawings of the Hutchinson stopper were part of the patent application for the device.
Patent Drawings, Hutchinson Stopper
Published at 868 × 559 in Photo Friday: Hecker Bros. Traveling Medicine Show
These drawings of the Hutchinson stopper were part of the patent application for the device.
Patent Drawings, Hutchinson Stopper