Differential ratio polariscope by Negretti and Zambra, with rotating prism

Made:: London

differential ratio polariscope by Negretti and Zambra, London, type devised by J. J. Field in 1869. fitted with a large Nicol prism 1 1/4"x2 1/2", with analysing prism and descriptive pamphlet

Details

Category:: Optics

Object Number:: 1920-779

type:: polarizer and nicol prism

credit:: J.C. Stevens (Auction Sales)

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Differential ratio polariscope by Negretti and Zambra

differential ratio polariscope by Negretti and Zambra, London, c. 1880, type devised by J. J. Field in 1869. fitted with a large Nicol prism 1 1/4"x2 1/2", with analysing prism and descriptive pamphlet