Internal Structure of the Seismograph

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The Ancient Astronomy

Excellence at the Center

Dengfeng Astro Observatory

Zhang Heng’s Seismograph, Han Dynasty

Abridged Armilla

Upward-looking Bowl Sundial

Sundial

Kui Ji

Internal Structure of the Seismograph

Reconstruction to the Seismograph

External Restoration to the Houfeng Seismograph, Milne

Reconstruction to the Seismograph, Wang Zhenduo

Modification to the Houfeng Seismograph Designed by Milne

Internal Structure of the Seismograph

Internal Structure of the Seismograp Reconstruction to the Seismograph,

Li Zhichao, 1993

Mr. Li Zhichao has been dedicated in the study of seismograph. His view is profound and original on the basis of others’ research findings on the internal operating structure and external configuration of the seismograph.

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