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　　When he was ten, Edison built his own chemistry 　　1　　．He sold sandwiches and newspapers on the local trains in order to earn money to buy 　　2　　 for his laboratory．His parents became used, more or less, 　　3　　 his experiments, which sometimes 　　4　　 the house．

　　Edison’s work as a salesboy with the railway introduced him to the 　　5　　 and, with a friend, he built his own telegraph set．He taught 　　6　　 the Morse telegraphic code and hoped for the chance to become a professional telegraph 　　7　　．A stroke of luck and Edison’s quick thinking soon provided the 　　8　　．

　　One day as young Edison stood 　　9　　 for a train to arrive, he saw the station master’s 　　10　　 wander into the track of an approaching train．Edison 　　11　　 and carried the boy to safety．The thankful station master 　　12　　 to teach Edison railway telegraphy．Afterwards, in 1863, he became an 　　13　　 telegraph operator and left home to work in various cities．

　　Six years later, in 1869, Edison arrived in New York City, poor and 　　14　　 debt．He went to work with a telegraph company．　　15　　 was here that he became interested in the 　　16　　 of electricity．At that time electricity was still in the 　　17　　 stage, and Edison hoped to invent new ways to use it for the 　　18　　 of people．As he once said,“My philosophy of life is work．I want to bring out the 　　19　　 of nature and apply them for the happiness of man．I know of no 　　20　　 work to do for the short time we are in this world．”

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