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File:Heliograph-2.jpg

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English: heliograph - Signaling with heliograph near Monument 92. Alaska - Canada border. International Boundary Commission
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Cropped. The original can be viewed here: Heliograph.jpg: . Modifications made by Macchess.


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This image is in the public domain because it contains materials that originally came from the U.S. National Oceanic and Atmospheric Administration, taken or made as part of an employee's official duties.

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Original upload log edit

This image is a derivative work of the following images:

  • Image:Heliograph.jpg licensed with PD-USGov
    • 2005-04-03T09:15:47Z Svdmolen 1376x900 (551067 Bytes) heliograph -http://www.photolib.noaa.gov/historic/c&gs/theb1633.htm {{PD}} [[category:science]]

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Date/TimeThumbnailDimensionsUserComment
current06:41, 29 June 2008Thumbnail for version as of 06:41, 29 June 2008528 × 665 (190 KB)Macchess~commonswiki (talk | contribs){{Information |Description={{en|heliograph - Signaling with heliograph near Monument 92. Alaska - Canada border. International Boundary Commission}} |Source=*Image:Heliograph.jpg |Date=2008-06-29 06:40 (UTC) |Author=*derivative work: ~~~ *[[:Image:H

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