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Hand-held spectroscope by Carl Zeiss, Jena

Hand-held spectroscope by Carl Zeiss, Jena

Pocket-sized spectroscope, cased, by John Browning

Pocket-sized spectroscope, cased, by John Browning

Pocket brass spectroscope in leather case

Pocket brass spectroscope in leather case

1751-1850
Pocket spectroscope by J. G. Hofmann

Pocket spectroscope by J. G. Hofmann

Direct vision hand held spectroscope by Browning

Direct vision hand held spectroscope by Browning

1867
Direct vision spectroscope in fitted box

Direct vision spectroscope in fitted box

Miniature direct vision spectroscope by W. Ladd and Co.

Miniature direct vision spectroscope by W. Ladd and Co.

Spectroscope

Spectroscope

1900-1980
Crookes Type Patent Spectroscope, 1861-1871

Crookes Type Patent Spectroscope, 1861-1871

1861-1871
Direct vision spectroscope

Direct vision spectroscope

1885-1895
McClean's type star spectroscope (patent) by John Browning

McClean's type star spectroscope (patent) by John Browning

Direct vision spectroscope

Direct vision spectroscope

Portable direct vision spectroscope (high power) with collapsible tripod by John Browning

Portable direct vision spectroscope (high power) with collapsible tripod by John Browning

Early form of direct vision pocket spectroscope in cylindrical brass case

Early form of direct vision pocket spectroscope in cylindrical brass case

1874-1885
Direct vision spectroscope by A. Hilger

Direct vision spectroscope by A. Hilger

1900-1904
Brass direct-vision spectroscope with adjustable split-jaw

Brass direct-vision spectroscope with adjustable split-jaw

1880-1899
Pocket spectroscope with adjustable slit

Pocket spectroscope with adjustable slit

1905-1915
Direct vision grating pocket microscope, 1890-1900

Direct vision grating pocket microscope, 1890-1900

Pocket spectroscope, by R. & J. Beck Ltd., London

Pocket spectroscope, by R. & J. Beck Ltd., London

1900-1980
Direct vision pocket spectroscope with adjustable slit, in metal case, made by Adam Hilger Ltd., London, c.1910.

Direct vision pocket spectroscope with adjustable slit

1905-1915
Direct-vision spectroscope by John Browning, London, in fitted wooden case (Wellcome transfer number B4490)

Direct-vision spectroscope by John Browning

1870-1940
Pocket spectroscope used by Sir William Ramsay in first observations of spectra of inert gases

Pocket spectroscope

Direct vision grating pocket microscope with adjustable slit made by T. Thorp, Manchester, with case, 1890-1900.

Direct vision grating pocket microscope with adjustable slit

1890-1900
Direct-vision spectroscope by Heele, London, on brass column with steel base

Direct-vision spectroscope by Heele

Two compound prisms for direct vision spectroscope by E. Lutz, Paris, 1876. Total length 11.3 cm and 10.8 cm. Length of each prism 2.6 cm

Two compound prisms for direct vision spectroscope by E. Lutz

1876
Direct vision spectroscope J.G. Hofmann, Paris

Direct vision spectroscope J.G. Hofmann

Direct vision spectroscope, formerly in the possession of Sir William Ramsay, Comprising brass collimator and brass telescope with micrometer and vernier scale for adjustments. The central tube containing the prism, and stand are missing. A label accompanying the instrument and describing it as Ramsay's is in the hand of Professor M.W. Travers (who presented it to the donor)

Direct vision spectroscope

High power direct vision portable spectroscope made by John Browing, 63 Strand, 1869-71, once owned by William Henry Fox Talbot

High power direct vision portable spectroscope made by John Browing

1869-1871
Spectroscope with comparison scale, used by Sir William Crookes, by John Browning, London, on foot 7" high, c. 1860-1870

Spectroscope with comparison scale

1860-1870