A demonstration under suspicionSourced
The proposed telegraph used snails
In France in 1850, Benoit claimed that previously mated snails could communicate at a distance. His apparatus assigned letters to 24 snails. The demonstration produced incorrect words while he walked between the devices. When a stricter test was arranged, he disappeared.
This is a record of a dubious demonstration, not successful telepathy.
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Pasilalinic-sympathetic compass · Wikimedia contributors
Pasilalinic-sympathetic compass ↗
Adapted, summarized and translated from the source. Adapted text is also available under CC BY-SA 4.0.
Reviewed: 2026-10-10