Page:Heroes of the telegraph (IA cu31924031222494).djvu/212

 attempt was made to utilise the electricity obtained by rubbing a cat connected up in lieu of a battery; but the spirit of Artemus Ward is by no means dead in the United States, and the anecdote may be taken with a grain of salt. Such an experiment was at all events predestined to an ignominious failure.

An act of heroism was the turning-point in his career. One day, at the risk of his life, he saved the child of the station-master at Mount Clemens, near Port Huron, from being run over by an approaching train, and the grateful father, Mr. J. A. Mackenzie, learning of his interest in the telegraph, offered to teach him the art of sending and receiving messages. After his daily service was over, Edison returned to Mount Clemens on a luggage train and received his lesson.

At the end of five months, while only sixteen years of age, he forsook the trains, and accepted an offer of twenty-five dollars a month, with extra pay for overtime, as operator in the telegraph office at Port Huron, a small installation in a jewelry store. He worked hard to acquire more skill; and after six months, finding his extra pay withheld, he obtained an engagement as night operator at Stratford, in Canada. To keep him awake the operator was required to report the word 'six,' an office call, every half-hour to the manager of the circuit. Edison fulfilled the regulation by inventing a simple device which transmitted the required signals. It consisted of a wheel with the characters cut on the rim, and connected with the circuit in such a way that the night watchman, by turning the wheel, could transmit the signals while Edison slept or studied.

His employment at Stratford came to a grievous end. One night he received a service message ordering a certain train to stop, and before showing it to