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  • 21 Aug, 2019

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File:Allegheny Observatory Photo Telescope Circa 1914.JPG
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current20:08, 6 February 2009Thumbnail for version as of 20:08, 6 February 2009546 × 733 (110 KB)Pmcyclist{{Information |Description={{en|1=Photograph of the Photographi Telescope located at the Allegheny Observatory near Pittsburgh, PA circa 1914}} |Source="Popular Mechanics" Magazine April 1914 |Author=Unknown |Date=1914 |Permission= |other_versions= }}

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