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.

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. العربية ∙ čeština ∙ Deutsch ∙ Zazaki ∙ English ∙ español ∙ eesti ∙ suomi ∙ français ∙ hrvatski ∙ magyar ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ മലയാളം ∙ Plattdüütsch ∙ Nederlands ∙ polski ∙ português ∙ română ∙ русский ∙ sicilianu ∙ slovenščina ∙ Türkçe ∙ Tiếng Việt ∙ 简体中文 ∙ 繁體中文 ∙ +/−

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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