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/.
Here is probably the most accurate replica reflecting the external shape of the "Zhang Heng seismograph". It gives a fairly good idea of what this instrument actually looked like. For example, it shows that originally only the heads of the dragons were attached to the "antenna chamber," not the whole dragons that are seen on other replicas. (In fact, whole dragons attached to the "antenna chamber" in my opinion can even distort the correct reception of the telepathic alarm signal, or "chi.") The only inaccuracy in the above replica is the uppermost part - it was originally a part of the spherical canopy and did not have the flange seen on the above replica.