A. An 18th-century hand-held "inker" used in making etchings
B. A "kuckle-buster" used by cheating gamblers c. 1875
C. A "smoke gun" invented (but never successfully used!) to shoot Morse code messages into the sky
D. A "miner's magnet" used for assaying in the field
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LAUGHING DOWN THE ROAD Caution: Funny Signs Ahead
What IS This Thing?
A.
