00:00The ancients would place eight iron balls in each of the suspended dragon's mouths.
00:05When an earthquake occurs, the balance device in the container will shift,
00:10pushing the iron ball below to slide in the opposite direction of the earthquake.
00:15When the iron ball hits the wooden rod, it will open the dragon's mouth and cause the ball to
00:21fall into the body that was eradicated below. Then by observing where the ball landed,
00:26the direction of the earthquake can be identified. In addition, the water quality is placed in a
00:33bottle filled with water and then connected to the small bell above with a wire. When the storm comes,
00:40the air pressure outside starts to drop, which causes the water to climb higher. When they touch
00:46a special mechanism, it pulls a thin wire that causes the hammer to hit the bell. The more water
00:52that climbs up, the more violent the storm is.
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