File:800px-Heliograph.jpg

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800px-Heliograph.jpg(800 × 523 pixels, file size: 123 KB, MIME type: image/jpeg)


NOAA's Historic C&GS (Coast and Geodetic Survey) Collection. Image ID: theb1632

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current07:39, 14 May 2009Thumbnail for version as of 07:39, 14 May 2009800 × 523 (123 KB)Cmditradmin (talk | contribs) NOAA's Historic C&GS (Coast and Geodetic Survey) Collection. Image ID: theb1632
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