direct-vision spectroscope

direct-vision spectroscope

[də¦rekt ¦vizh·ən ′spek·trə‚skōp]
(spectroscopy)
A spectroscope that allows the observer to look in the direction of the light source by means of an Amici prism.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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He also gives instructions for making eyepieces, a prism star diagonal, a Herschel wedge, and a direct-vision spectroscope. He covers mountings, clock drives, astrophotography, observatory structures, and sundials.
A forgotten observing classic: 1001 Celestial Wonders, by C. E. Barns, deserves a place among the great observing guides of the last two centuries

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