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Sorby-Browning micro-spectroscope in case

Sorby microspectroscope in case

1871-1900

Microspectroscope by John Browning

1851-1900

Micro-spectroscope with bright point micrometer with adapter tube by John Browning

1885-1888
Automatic spectroscope by G. and S. Merz (unsigned). Two micrometer slits in a mahogany box, drum of each divided into 100 parts. a) Sorby eyepiece in box by "A Hilger London", with position micrometer; 1 small screw missing, in mahogany box. Spectroscope is heavily constructed, height about 16", diam. of plate 12 1/2", 6 prisms, 3 eyepieces with washleather cover at eye end

Automatic spectroscope by G. and S. Merz (unsigned)