The arrangement of the prisms relative to the telescope is automatically adjusted through a series of levers for minimum deviation of the observed frequency.
The following excerpt is from The Popular Science Review, H. Lawson Ed., 1871
John Browning, 63 Strand, London
Multi-prism Automatic Laboratory Spectroscope c. 1875
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The arrangement of the prisms relative to the telescope is automatically adjusted through a series of levers for minimum deviation of the observed frequency.
The following excerpt is from The Popular Science Review, H. Lawson Ed., 1871
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More information about John Browning can be found on the antique telescope web site Antique Scopes
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