File:PSM V17 D215 Demonstration of geological pressure plates using clay.jpg

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Description Demonstration of geological pressure plates using clay
Date
Source Popular Science Monthly Volume 17
Author Unknown authorUnknown author
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current04:04, 16 August 2010Thumbnail for version as of 04:04, 16 August 2010640 × 1,337 (185 KB)Ineuw (talk | contribs){{Information |Description = Demonstration of geological pressure plates using clay |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_17.djvu/215 |Date = 1880 |Author = Unknown |Permission = {{PD-old}} |other_versions = }}

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