EastHanSeismograph.JPG(480 × 552 elementa imaginalia, magnitudo fasciculi: 232 chiliocteti, typus MIME: image/jpeg)

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Summarium

Descriptio
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.
Datum
Fons en:File:EastHanSeismograph.JPG
Auctor en:user: Kowloonese

Potestas usoris

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attributio aequa parte
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
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  • to remix – to adapt the work
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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

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Items portrayed in this file

depicts Anglica

copyrighted Anglica

Iulius 2004

exposure time Anglica

0.03333333333333333333 secundum

f-number Anglica

2.8

focal length Anglica

8 millimetrum

ISO speed Anglica

320

MIME type Anglica

image/jpeg

Historia fasciculi

Presso die vel tempore fasciculum videbis, sicut tunc temporis apparuit.

Dies/TempusMinutioDimensionesUsorSententia
recentissima13:10, 10 Ianuarii 2014Minutum speculum redactionis 13:10, 10 Ianuarii 2014 factae480 × 552 (232 chiliocteti)SoerfmLevels, crop
13:10, 10 Ianuarii 2014Minutum speculum redactionis 13:10, 10 Ianuarii 2014 factae480 × 552 (232 chiliocteti)SoerfmLevels, crop
14:33, 25 Martii 2005Minutum speculum redactionis 14:33, 25 Martii 2005 factae480 × 585 (87 chiliocteti)ShizhaoA replica of an ancient Chinese Siesmograph from Eastern Han Dynasty (25-220 CE) This picture was taken in July 2004 from an exhibition at Chabot Space & Science Center in Oakland California. The plaque of the exhibit said: <b>Detecting a Quake</b> <br>

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