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body. And few people, if any, are initiated into its inner mysteries New York system was rebuilt three times in sixteen years; and many a and comparisons. It cannot be shown by photography, not even in rather the wonderful mechanism of the Switchboard. This is the part that to Berlin. It may cost as much as a thousand pianos or as much as three simple telephone itself, nor the maze and mileage of its cables, but will always remain mysterious to the public. It is seldom seen, and it remains as great a mystery to those who have seen it as to those who electric lamps and nerved with as much wire as would reach from New York systems have changed repeatedly without any interruption of traffic. except those who belong to its own cortege of inventors and attendants. age. What with repairs and inventions and new construction, the various have not. Explanations of it are futile. As well might any one expect to learn Sanscrit in half an hour as to understand a switchboard by making it may have two million parts. It may be lit with fifteen thousand tiny The constant flood of new inventions has necessitated several complete square miles of farms in Indiana. The ten thousand wire hairs of its A telephone switchboard is a pyramid of inventions. If it is full-grown, of the twentieth century, without hindering for a day the ceaseless The crowning glory of a telephone system of to-day is not so much the that either man or Nature has ever made. It defies all metaphors costly switchboard has gone to the scrap-heap at three or four years of rebuildings. Little or nothing has ever been allowed to wear out. The torrent of electrical conversation. a tour of investigation around it. It is not like anything else Bell companies have spent at least $425,000,000 in the first ten years moving-pictures, because so much of it is concealed inside its wooden

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