Happy Memorial Day from the Grateful American Foundation.
Jacques Toussaint Benoit pasilalinic-sympathetic compass is an apparatus that consists of a square wooden box containing a large horizontal disc. In the disc are 24 holes, eachcontaining a zinc dish lined with a cloth soaked in a coppersulphate solution; the cloth was held in place by a lineof copper. At the bottom of each of the 24 basins is a snail, glued in place, and each associated with a different letterof the alphabet. An identical second device holds the paired snails. To transmit a letter the operator touches one of the snails. This causes a reaction in the corresponding snail whichcan be read by the receiving operator.
