De quoi est fait Zhang Heng’s seismoscope
A bronze vessel with balls that showed the direction of an earthquake.
- Ancient bronze vessel — a pour partie. A hull.
- Bronze dragon heads holding balls — a pour partie. Eight directions.
- Bronze toads with open mouths — a pour partie. They catch the ball when it drops.
- Pendulum — a pour partie. An internal pendulum (according to reconstructions).
- Pendulum — utilise. An internal pendulum (according to reconstructions).
- Bronze — est fait de. A bronze vessel.