J. Swift, Optician, 128 City Road, London E. C.

Binocular microscope for conventional and polarized light microscopy

c. 1870

J. Swift, Optician, 128 City Road, London E. C. Binocular microscope for conventional and polarized light microscopy, c. 1870

J. Swift, Optician, 128 City Road, London E. C. Binocular microscope for conventional and polarized light microscopy, c. 1870

J. Swift, Optician, 128 City Road, London E. C. Binocular microscope for conventional and polarized light microscopy, c. 1870

J. Swift, Optician, 128 City Road, London E. C. Binocular microscope for conventional and polarized light microscopy, c. 1870

J. Swift, Optician, 128 City Road, London E. C. Binocular microscope for conventional and polarized light microscopy, c. 1870. Accessories

The five objectives supplied with this microscope were all made by Henry Crouch, London.

 

J. Swift, Optician, 128 City Road, London E. C. Binocular microscope for conventional and polarized light microscopy, c. 1870.Stored in the case.

J. Swift, Optician, 128 City Road, London E. C. Binocular microscope for conventional and polarized light microscopy, c. 1870. Wood case.

J. Swift, Optician, 128 City Road, London E. C. Binocular microscope for conventional and polarized light microscopy, c. 1870. Prism mountings.

J. Swift, Optician, 128 City Road, London E. C. Binocular microscope for conventional and polarized light microscopy, c. 1870. Substage

The dating of this microscope relies of the fact that James Powell Swift was located on City Road only for a few years, 1870-1872. He was thereafter located at 43 University St. and by 1877, the firm was known as James Swift & Son.

This binocular microscope was specially designed for both conventional and polarized light microscopy. The nosepiece has a Nicol prism mounted above the Wenham prism with each residing in a sliding brass box so that they can be introduced or removed from the light path. This arrangement can allow for simultaneous use of both prisms thereby resulting in a stereoscopic image using polarized light.

From the Swift catalog: "Swift's Adaptation of the Analysing Prism to the Binocular Microscope. The advantages of this adaptation, are effectual illumination in both bodies, and (the analyser being placed above the binocular prism) the transmission of a greater amount of light, and less distortion consequent upon the lessening of the distance between the objective and binocular prism"

A specialize achromatic substage condenser, described below, was designedfor this microscope.

Extracted from: English Mechanic and Mirror of Science, Vol. 11, 1870 :

Swift achromatic condenser

A short time since Mr. James Swift, of the City Road, presented to the Royal Microscopical Society an achromatic condenser he had just completed, which has the advantage of containing more accessories than any other piece of apparatus, as Figs. 8 and 9 will show:

    A, optical combination.

    B, rack adjustment for focussing.

    C, sliding frame with parts for dark ground illumination.

    D, large diaphragm.

    E, rotating cap to carry test stops.

    F, small diaphragm of apertures.

    G, polarizing prism.

    H, selenite diaphragm.

    I, oblique light shutter.

 

J. Swift, Optician, 128 City Road, London E. C.

bar-limb binocular microscope

An 1870 advertisement

James swift advertisement

Home Page-Antique Microscopes       Site Index

www.antique-microscopes.com