https://s3.amazonaws.com/omeka-net/36717/archive/files/5fe9b32ae4fcc9d4abaafcdf1781d7a8.JPG?AWSAccessKeyId=AKIAI3ATG3OSQLO5HGKA&Expires=1551713315&Signature=O%2FFxIwSdz%2BjjiCmqktNH9nVWmJ0%3D

Media

Part of "Cary-Gould type" Pocket Microscope