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Scientific American, Vol. 58, No. 19 (1888) (1888)
leaf 4
eceiver, as the ope- contents, the cap being then put in place and the seal- rator may place the conductors on his tongue and note ing composition subsequently filled in. To unseal the the sensations due to the completion of the circuit, or jar the ring is first removed, thereby exposing the wax a… … © 1888 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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