EDISON’S FIRST INVENTION.
It is stated that when Edison was a telegraph operator much annoyance was caused by cockroaches getting into the tin cans in which the boys carried their lunches. Various methods of getting rid of them were tried, but without success, aud then Edison made a bet that he would exterminate the toe. The next day the dinner cans were piled in a heap, and the wizard surrounded them with a circle of tinfoil ncbon about one inch wide. About a quarter of an inch away he placed a similar circle, both ribbons being upright, and then connected t - n with a battery. Along came the cockroaches. To surmount the obstacles they had to place their hind legs on the on er ribbon air' their forelegs on the inner c,-c. The moment they did so the circuit was completed, and they toppled over dead.
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Manawatu Herald, Volume XXXVI, Issue 1257, 11 June 1914, Page 4
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146EDISON’S FIRST INVENTION. Manawatu Herald, Volume XXXVI, Issue 1257, 11 June 1914, Page 4
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