Image: Fraunhofer spectroscope
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Description: Joseph von Fraunhofer demonstrating the spectroscope. On left Joseph von Utzschneider, on right Georg Friedrich von Reichenbach. Photogravure from a painting by Richard Wimmer.
Title: Fraunhofer spectroscope
Credit: "Essays in astronomy" - D. Appleton & company, 1900 (LCCN 00004435)
Author: Richard Wimmer
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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