. The great American book of biography . for two hours with currents of different the end of this time he told the officers that the trouble was at a certain pointon the line, and what it was. They telegraphed the office nearest that point,giving the necessary directions, and in an hour the wire was working established his reputation as an expert, and he soon began to rise in thisline of business. Edisons first large profits came to him from the stock ticker, an inven-tion for reporting in brokers offices the prices of stocks on the exchange, which WORK AT MENLO PA
. The great American book of biography . for two hours with currents of different the end of this time he told the officers that the trouble was at a certain pointon the line, and what it was. They telegraphed the office nearest that point,giving the necessary directions, and in an hour the wire was working established his reputation as an expert, and he soon began to rise in thisline of business. Edisons first large profits came to him from the stock ticker, an inven-tion for reporting in brokers offices the prices of stocks on the exchange, which WORK AT MENLO PARK. 461 is now in universal use. He settled himself in Newark, N. J., where he renteda shop and began to manufacture his machines. His connection with capitalists led to his making a propo-^ sition to an association ofwealthy men to experimentwith electric lighting, they tosupply the capital. He re-moved his shop to Menloik Park, a quiet and secludedplace, where he carried on hisexperiments, which soon re-sulted in success. This placed. THE NEW YORK STOCK EXCHANGE. him in an independent position, and fromthat time to the present his success hasbeen only a question of degree. Edison is a man of infinite pertinacity and great endurance. When hebecomes interested in solving an important question, he is entirely oblivious of 462 THOMAS A. EDISON. the passage of time and of physical needs. At one time, when his printingtelegraph for some reason gave out and ceased to work, he worked for sixtyhours without intermission, taking no sleep or rest, having for his only foodcrackers and cheese, at which he nibbled from time to time as he worked. Atanother time all of the electric lamps burning in Menio Park suddenly gave inventor was almost stunned. For five days he worked at the problem,giving neither himself nor his assistants any rest. At the end of that time thedifficulty was still unsolved, and Edison went to bed sick with disappointmentand anxiety. Ordinarily he is one of the
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