Viewer, thick lens set in cork

Viewer, thick lens set in cork

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Viewer, thick lens set in cork
Science Museum Group
© The Board of Trustees of the Science Museum

Viewer, thick lens set in cork, at top of cylinder with hole in the base, with a plane disc held by a spring against the lens, French, late 19th century