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Update: 25.01.23

Copyright Dr. Eng. Jan Pająk

Img.533 from Seismograph (#E1b)

Img.533 (#E1b) An old drawing of "houfeng didongy yi." It is shown in an article by Sara Rhodes, "Chinese Contribution", in 2003 available on the web site home.earthlink.net (suggests to have a look at this interesting article). Notice from the shape of its "antenna chamber" how perfectly this shape is adapted to focus telepathic signals bouncing off the walls at the water inlets to the dragons' mouths.

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