File:PSM V68 D383 Coelostat and second mirror of the new telescope.png

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English: Coelostat and second mirror of the new telescope
Date between 1905 and 1906
date QS:P,+1905-00-00T00:00:00Z/8,P1319,+1905-00-00T00:00:00Z/9,P1326,+1906-00-00T00:00:00Z/9
Source Popular Science Monthly Volume 68
Author Unknown authorUnknown author

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