Am 28.03.2007 um 16:32 schrieb Martin Peach:
The patterns probably depend on the stiffness of the plate/membrane as well as its shape, and the grain size and density of the sand. By
actually dr. hans jenny used a special pollen (lycopodium spores),
not sand. because sand has a crystalline structure while the pollen
is a perfect sphere. (by the way lycopodium is also a homeopathic
substance associated with the male sexuality, comes up on google...)
check out those vids (round membrane here, nasty sound) :
http://www.harmonyera.com/videos/HJenny01.avi http://www.harmonyera.com/videos/HJenny02.avi http://www.harmonyera.com/videos/HJenny03.avi http://www.harmonyera.com/videos/HJenny04.avi
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