Zhang Heng’s seismoscope
device · 132 · Ancient world
A bronze vessel with balls that showed the direction of an earthquake.
What it is made of
- Ancient bronze vessel — has part. A hull.
- Bronze dragon heads holding balls — has part. Eight directions.
- Bronze toads with open mouths — has part. They catch the ball when it drops.
- Pendulum — has part. An internal pendulum (according to reconstructions).
Principles and materials it uses
- Bronze — is made of. A bronze vessel.
- Pendulum — uses. An internal pendulum (according to reconstructions).
History: what it evolved from and what it influenced
- Seismograph — evolved into. The first instrument for detecting earthquakes.