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.
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He also gives instructions for making eyepieces, a prism star diagonal, a Herschel wedge, and a direct-vision spectroscope.

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