https://s3.amazonaws.com/omeka-net/36717/archive/files/7798d04e9e6632ae6da985a0c1759a94.JPG?AWSAccessKeyId=AKIAI3ATG3OSQLO5HGKA&Expires=1551713320&Signature=IFBCm85p8%2Fd7YbgESUa%2BHH%2B7QbE%3D

Media

Part of R & J Beck Compound Microscope