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File:PSM V29 D320 Ancient chinese choko seismoscope from 136 a d.jpg

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Description Ancient Chinese Choko seismoscope from 136 A.D.
Date
Source Popular Science Monthly Volume 29
Author Unknown authorUnknown author
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Public domain
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
United States
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

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current15:50, 15 September 2010Thumbnail for version as of 15:50, 15 September 20101,162 × 1,387 (249 KB)Ineuw{{Information |Description = Ancient Chinese Choko seismoscope from 136 A.D. |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_29.djvu/320 |Date = 1886 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Cat

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