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Erowid References Database

Witt PN. 
“d-Lysergsäure-diäthylamid (LSD 25) im Spinnentest”. 
Experientia. 1951;7:310.
Abstract
Using a special technique, an investigation was made of webs made by spiders under the influence of LSD and mescaline. The most striking difference was that the exactitude of the angles was better with LSD (< 0.05 mcg.) than with mescaline. It, therefore, seems likely that the effects of the two drugs in man are due to different sites of action.
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