File:PSM V14 D024 Green and gray papers for contrast experiment.jpg

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Description Green and gray papers for contrast experiment
Date between 1878 and 1879
date QS:P,+1878-00-00T00:00:00Z/8,P1319,+1878-00-00T00:00:00Z/9,P1326,+1879-00-00T00:00:00Z/9
Source Popular Science Monthly Volume 14
Author Unknown authorUnknown author
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current08:23, 11 February 2016Thumbnail for version as of 08:23, 11 February 2016601 × 609 (14 KB)Ineuwcentered image
15:06, 5 August 2010Thumbnail for version as of 15:06, 5 August 2010660 × 633 (15 KB)Ineuw{{Information |Description = Green and gray papers for contrast experiment |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_14.djvu/24 |Date = 1878-1879 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Ca
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