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 the conductor he, perhaps for greater certainty, repeated it back again. When he rushed out of the office to deliver it the train was gone, and a collision seemed inevitable; but, fortunately, the opposing trains met on a straight portion of the track, and the accident was avoided. The superintendent of the railway threatened to prosecute Edison, who was thoroughly frightened, and returned home without his baggage.

During this vacation at Port Huron his ingenuity showed itself in a more creditable guise. An 'ice-jam' occurred on the St. Clair, and broke the telegraph cable between Port Huron and Sarnia, on the opposite shore. Communication was therefore interrupted until Edison mounted a locomotive and sounded the whistle in short and long calls according to the well-known 'Morse,' or telegraphic code. After a time the reporter at Sarnia caught the idea, and messages were exchanged by the new system.

His next situation was at Adrian, in Michigan, where he fitted up a small shop, and employed his spare time in repairing telegraph apparatus and making crude experiments. One day he violated the rules of the office by monopolising the use of the line on the strength of having a message from the superintendent, and was discharged.

He was next engaged at Fort Wayne, and behaved so well that he was promoted to a station at Indianapolis. While there he invented an 'automatic repeater,' by which a message is received on one line and simultaneously transmitted on another without the assistance of an operator. Like other young operators, he was ambitious to send or receive the night reports for the press, which demand the highest speed and accuracy of sending. But although he tried to overcome his faults by the device of employing an