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Piece, one of five, of struck ruby gold glass

5 assorted pieces, spare parts and trial pieces from Charles Babbage's difference engine

Piece, one of five, of struck ruby gold glass

Piece, one of five, of struck ruby gold glass

Five pieces of struck ruby gold glass

Five pieces of struck ruby gold glass, 1968.

Swatch of Arnica from homeopathic medicine chest, rectangular, London, England, 1880-1910

Swatch of Arnica from homeopathic medicine chest

1880-1910
Swatch of calendula from homeopathic medicine chest, rectangular, London, England, 1880-1910

Swatch of calendula from homeopathic medicine chest

1880-1910
24 assorted brass pieces, spare parts and trial pieces (brass) from Charles Babbage's difference engine

24 assorted pieces, spare parts and trial pieces from Charles Babbage's difference engine

5 additional wood and metal pieces from the model of the boiler the HMS Thunderer (1872), illustrating the damage sustained by the machinery after an explosion in 1876, consists of 1) one wooden gasket pipe joint, 2) two connecting pipes, one of which has a blast hole in the side, 3) two warped sections of boiler plating, the larger of which fits the right hand side end of the boiler wall, and the smaller fits longitudinaly across the top part of the front of the boiler.

5 additional metal pieces from the model of the boiler of the HMS 'Thunderer'

1876-1925
Swatch of Arnica from homeopathic medicine chest, rectangular, London, England, 1880-1910

Swatch of Arnica from homeopathic medicine chest

1880-1910
Tourmaline pieces set in a circular brass mount for use with a polariscope, by Bellingham and Stanley Ltd., leather case, circa 1935, (Wellcome B890)

Tourmaline pieces set in a circular brass mount for use with a polariscope