https://s3.amazonaws.com/omeka-net/36717/archive/files/25c507b5c224940842bc8ef64ca821d9.JPG?AWSAccessKeyId=AKIAI3ATG3OSQLO5HGKA&Expires=1551713315&Signature=nnKSfN3AF%2BifLVLaV0Tsjyq6%2FHE%3D

Media

Part of "Cary-Gould type" Pocket Microscope