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Dual vision spectrometer on metal stand

1850-1924

Spectrometer, fitted with replica of Rowlands grating

1905-1907

Large goniometer and spectrometer with heating apparatus and two thermometers

1880-1885
Hilger-Watts spectrometer plus power pack, instructions and accessories (sample holders, quartz)

Hilger-Watts spectrometer plus power pack

Echelon spectroscope, with wave length drum (Prism and Echelon grating chipped) by Adam Hilger Ltd., London, England, 1905, comprised of two units: constant deviation spectrometer and echelon grating.

Echelon spectroscope

1905
Large spectrometer made by E.R. Watts and Son (1921), dismantled into four parts as follows:

Large spectrometer made by E.R. Watts and Son (1921)

Three-prism spectrometer by John Browning, London, in fitted wooden case, marked "Brit. Mus. (NH)/Min: Dep:/No.1

Three-prism spectrometer by John Browning

1870-1940
Absorption spectrometer by Schmidt & Haensch, Berlin, owned by Dr. A. Bruce, Edinburgh, 1890-1910

Absorption spectrometer by Schmidt & Haensch

1890-1910