File:EastHanSeismograph.JPG
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EastHanSeismograph.JPG (480 × 552 pixels, file size: 232 KB, MIME type: image/jpeg)
This file is from Wikimedia Commons and may be used by other projects. The description on its file description page there is shown below.
Summary
DescriptionEastHanSeismograph.JPG |
English: A replica of an ancient Chinese Seismograph from Eastern Han Dynasty (25-220 CE). This picture is taken from an exhibition at Chabot Space & Science Center in Oakland, California. The plaque of the exhibit said: Detecting a Quake In 132 CE, after several earthquakes in China, astronomer Zhang Heng invented this instrument to warn people of the next one. When the ground shook, it moved a pendulum inside the jug. The pendulum pushed a lever that opened one dragon's mouth. A ball rolled out and into the toad's mouth below, sounding an alarm. The open dragon mouth pointed in the direction of the earthquake, notifying the Emperor. |
Date | |
Source | en:File:EastHanSeismograph.JPG |
Author | en:user: Kowloonese |
Licensing
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. | ||
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This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
Original upload log
The original description page was here. All following user names refer to en.wikipedia.
Upload date | User | Dimensions | Comment
04:08, 12 July 2004 |480 × 585 (87 KB) | Kowloonese (talk | contribs) | Ancient Chinese Siesmograph from Eastern Han Dynasty
Items portrayed in this file
depicts
July 2004
0.03333333333333333333 second
2.8
8 millimetre
320
image/jpeg
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:10, 10 January 2014 | 480 × 552 (232 KB) | wikimediacommons>Soerfm | Levels, crop |
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