Nicol polarizing prism
1871-1900
Iceland spar
1876
Nicol prism, in cylindrical brass mount
1870
Petrographical microscope
Foucault prism (one half of complete polarizing prism)
1876
Bertrand prism of Iceland Spar
Mrs Spottiswoode's pocket polariscope
Polarising microscope condenser lens assembly and polarising eyepiece with circular scale
De Senarmont Calcite Prism by Edouard Lutz, Paris, 1876
1870-1876
Pair of nicol prisms fitted on single bone-handled mount one of the prisms being rotatable
1875-1924
Rachon prism (cement joint broken)
Prasmowski prism - length 4.9cm
Six Nicol prism polarisers
1900-1936
Differential ratio polariscope by Negretti and Zambra, with rotating prism
Patent projective microscope by Newton & Co.
1885-1890
Set of 12 Nicol prisms in case by E. Lutz
1870-1876