https://s3.amazonaws.com/omeka-net/36717/archive/files/f45239687f16ec1df13de1a874581535.JPG?AWSAccessKeyId=AKIAI3ATG3OSQLO5HGKA&Expires=1551713315&Signature=xlyrdVfMTR1W%2FwnyDlr6MQqB9aA%3D

Media

Part of "Cary-Gould type" Pocket Microscope