File:PSM V64 D136 Triangular cells.png

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Description
English: Triangular cells
Date between 1903 and 1904
date QS:P,+1903-00-00T00:00:00Z/8,P1319,+1903-00-00T00:00:00Z/9,P1326,+1904-00-00T00:00:00Z/9
Source Popular Science Monthly Volume 64
Author Unknown authorUnknown author

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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
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current01:50, 14 September 2011Thumbnail for version as of 01:50, 14 September 2011906 × 274 (34 KB)Ineuw (talk | contribs)

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