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Mrs Spottiswoode's pocket polariscope, with Nicol

Optics

Polarising microscope condenser lens assembly and

Microscopy (Wellcome)

Rachon prism (cement joint broken)

Optics

Prasmowski prism - length 4.9cm

Optics

Bertrand prism of Iceland Spar

Optics

De Senarmont Calcite Prism by Edouard Lutz, Paris, 1876

Optics

1870-1876

Iceland spar, cut in three directions - perpendicu

Optics

1876

Nicol prism, in cylindrical brass mount

Optics

1870

Pair of nicol prisms fitted on single bone-handled mount

Science Teaching

1875-1924

Eleven Nicol prisms from set of 12, in case

Optics

1876

Nicol polarizing prism, brass and glass, British(?

Microscopy (Wellcome)

1871-1900

Foucault prism (one half of complete polarizing pr

Optics

1876

Selection of six Nicol prisms (cemented composite crystal of Iceland spar - calcite), unsigned, supplied by James Swift and Son Limited, London, England, 1900-1936.

Six Nicol prism polarisers

Optics

1900-1936

Square double Nicol prism, one of six (quadruple cemented composite crystal of Iceland spar - calcite), unsigned, supplied by James Swift and Son Limited, London, England, 1900-1936. For use as a polarizer lens in a microscope.

Nicol prism polariser

Optics

1900-1936

Patent projective microscope by Newton & Co., London, c.1887. Fitted with 5-inch condenser, front lens with rack work, polarising prism and arm, convergent systems, iron lined body made for electric or limelight rotating-divided stage and analyser, also substage condensers nos. 2 & 5, in wooden case. The accessories comprises 4 objectives 1/4 undulation and Klein's quartz plates, adjustable slit, 4 diaphragms, additional condensers, adapting tubes etc.

Patent projective microscope by Newton & Co., Lond

Microscopes

1885-1890

Set of 12 Nicol prisms in case by E. Lutz, Paris, c. 1876.

Set of 12 Nicol prisms in case by E. Lutz, Paris,

Optics

1870-1876

Petrographical microscope, designed by Prof. C.Lehmann, for examining crystals at high temperatures. The equipment of this microscope comprises:- four eye-pieces, three objectives, Nicol prism polarizer with converging system, heating apparatus and hand bellows, two special stages (raised and with cups), two enlarging lenses, asbestos lined tube, selenite plate, blue glass plate

Petrographical microscope, designed by Prof. C.Leh

Microscopes

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

differential ratio polariscope by Negretti and Zam

Optics

Rectangular Nicol prism, one of six (double cemented composite crystal of Iceland spar - calcite) in cork mount, unsigned, supplied by James Swift and Son Limited, London, England, 1900-1936. For use as a polarizer lens in a microscope.

Nicol prism polariser

Optics

1900-1936

Rectangular Nicol prism, one of six (double cemented composite crystal of Iceland spar - calcite), unsigned, supplied by James Swift and Son Limited, London, England, 1900-1936. For use as a polarizer lens in a microscope.

Nicol prism polariser

Optics

1900-1936

Rectangular Nicol prism, one of six (double cemented composite crystal of Iceland spar - calcite) in loose cork mount, unsigned, supplied by James Swift and Son Limited, London, England, 1900-1936. For use as a polarizer lens in a microscope.

Nicol prism polariser

Optics

1900-1936

Square Nicol prism, one of six (double cemented composite crystal of Iceland spar - calcite), unsigned, supplied by James Swift and Son Limited, London, England, 1900-1936. For use as a polarizer lens in a microscope.

Nicol prism polariser

Optics

1900-1936

Rectangular Nicol prism, one of six (double cemented composite crystal of Iceland spar - calcite) in cork mount, unsigned, supplied by James Swift and Son Limited, London, England, 1900-1936. For use as a polarizer lens in a microscope.

Nicol prism polariser

Optics

1900-1936