< = back | = > Images (overview) < =

Blue links lead to the fully translated html versions of the page, purple links lead to pages whose start pages (as well as introductions and tables of contents at least) are already set up, green links lead to extern sites, grey means that no file is available yet).

/Notes in this color and between two / are from the operator of the German mirror site and translator/.


Update: 25.01.23

Copyright Dr. Eng. Jan Pająk



Img.537 from Seismograph (#E3)

Img.537 (#E3) There is a factory in Hong Kong calling itself "Sinopro International Ltd." that produces replicas of this instrument for interested customers. The photo above shows two replicas of the "Zhang Heng seismograph," which were produced just by this factory and installed at the Sheraton Hotel of Chengdu, China.

Visitors since 15.12.22: (english sites)