Microspectroscope with Accessories and Case, by A. Hilger, London, after 1878

The tube that fits into the miroscope screws into a cylindar with various slits, a stage for holding solutions, a mirror on an arm, and a calibrated knob for scanning the spectrum. On top of this is another tube fitted to a mounting and movable by rackwork. Inside this tube is the train of five prisms, two of flint between three of crown glass. At the top is the eyepiece and a side attachment with a rectangular platform holding a graticule and a tiny mirror.

There are about 8 glass vials wrapped in paper (some broken).

Box: fitted wood.

The microspectrometer was invented in 1864 by Henry Clifton Sorby.

See. H E Rosoe 'Spectrum Analysis' (London 1869) and John Browning 'How to work with the Spectroscope' (London 1878) for more information on microspectrometers. See JRMS (1878) p. 326-30 for a description of this instrument.