File:PSM V15 D831 Spectroscope disk close up.jpg
PSM_V15_D831_Spectroscope_disk_close_up.jpg (502 × 183 pixels, file size: 11 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 04:02, 14 August 2010 | 502 × 183 (11 KB) | Ineuw | {{Information |Description = Spectroscope disk close up |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_15.djvu/831 |Date = 1879 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Category:Popular Science |
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