https://s3.amazonaws.com/omeka-net/36717/archive/files/3a7cd0c557a2937f096873d1e0671e9a.JPG?AWSAccessKeyId=AKIAI3ATG3OSQLO5HGKA&Expires=1551713315&Signature=EtnNZVSeAZ8PDLUeQXL1Gn4Dssk%3D

Media

Part of "Cary-Gould type" Pocket Microscope