Iceland spar, cut in three directions - perpendicular, parallel, and oblique to the axis, by L. Laurent, Paris, France, 1876. Greatest measurement 2 1/2-inches. Inside glass dome fixed to wooden base. (Displayed with original label.)
- Object Number:
- Iceland spar, brass (copper, zinc alloy), copper (alloy), cotton (textile), cotton tape, glass, metal (unknown), velvet, wood (paint), wood (unidentified), wood (varnish)
prism: 65 mm x 70 mm x 75 mm, ,
- Laurent, L�on
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