Tag Archives: seismograph
Ancient Chinese Seismometer
In ancient China, earthquake warnings arrived via metal dragons and frogs. The mouths of the dragons were hinged and held a brass ball. When the pendulum would swing slightly, the ball would release and noisily fall into the mouth of … Continue reading
Posted in Uncategorized
Tagged cartoon, earthquake, geologic, infographic, Infotoon, michael kline, seismograph, United States Earthquake, Virginia earthquake
Leave a comment