File:Dorno Thilenius Pyrheliograph.jpg

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Description Pyrheliography designed by Carl Dorno and Rudolf Thilenius
Date
Source Dorno, C. (1922). "Progress in Radiation Measurments". Monthly Weather Review. 50 (10): 515. Bibcode:1922MWRv...50..515D. doi:10.1175/1520-0493(1922)50<515:PIRM>2.0.CO;2. ISSN 1520-0493.
Author Carl Dorno
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Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Dorno_Thilenius_Pyrheliograph.jpg

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Date/TimeThumbnailDimensionsUserComment
current03:15, 15 July 2021Thumbnail for version as of 03:15, 15 July 2021423 × 618 (193 KB)Shyamal (talk | contribs){{Information |Description=Pyrheliography designed by Carl Dorno and Rudolf Thilenius |Source=Dorno, C. (1922). "Progress in Radiation Measurments". Monthly Weather Review. 50 (10): 515. Bibcode:1922MWRv...50..515D. doi:10.1175/1520-0493(1922)50<515:PIRM>2.0.CO;2. ISSN 1520-0493. |Date=1922 |Author=Carl Dorno |Permission={{pd-1923}} |other_versions= }} Category:Meteorological equipment

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