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Several hermetically sealed nickel cadmium cells

Glass-stoppered bottle containing cadmium

1801-1892 (prepared)

Weston normal cell (photo-electric), Cadmium type, with glass fronted case, serial no. 14862, by H. Tinsley and Co., London, England, 1926.

Weston normal cell (photo-electric)

1926

Five bottles of eutectic alloys of various metals to show the percentage which gives an alloy of the lowest melting point.

Five bottles of eutectic alloys of various metals

1885