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Magnifier, English, 1851-1900

1851-1900

Two lens viewer with watchglass

1880-1900

Hand magnifier of three lenses in pivoting mounts

1871-1900

Finsen tube, brass, by Niels R. Finsen, used by Julius Warberg, Copenhagen, Denmark, 1900-1925

Finsen tube

1900-1925

Myoscope by Clement Clarke Ltd., slide set and red and green screen for fitting to front of projector missing, English, 1923-1940

Myoscope by Clement Clarke Ltd.

1923-1940