File:PSM V29 D203 Clock rigged to drop a weight on the hour.jpg
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current | 06:03, 15 September 2010 | 2,355 × 1,196 (146 KB) | Ineuw | {{Information |Description = Clock rigged to drop a weight on the hour |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_29.djvu/203 |Date = 1886 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Category: |
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