Images 1-6 of 6
- Chang Heng's Dragon JarChang Heng's Dragon Jar
- James Forbes Seismometer 1844
- Robert Mallet - 1851 Seismoscope Robert Mallet's seismoscope
- Luigi Palmieri of Italy - Mercury SeismometerIn 1855, Luigi Palmieri of Italy designed a mercury seismometer.
- Zöllner's Horizontal-Pendulum Suspension - 1869Zöllner's horizontal-pendulum suspension
- Cecchi Seismograph - 1875The record obtained by a Cecchi seismograph at Moncalieri, Italy, on February 23, 1887
- Graphic Index
- Text Index
