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Updated: May 19, 2025
In that office, where Andrew Carnegie was a messenger boy, the magnets in use to receive the signals sent with the aid of powerful nitric-acid batteries weighed as much as seventy-five pounds apiece. But the business was fortunately small at the outset, until the new device, patronized chiefly by lottery-men, had proved its utility. Then came the great outburst of activity.
They were about the size of those seen in old-fashioned country hotels for holding the wash-bowl and pitcher. The copper wires connecting the instruments to the switchboard were small, crystallized, and rotten. The battery-room was filled with old record-books and message bundles, and one hundred cells of nitric-acid battery, arranged on a stand in the centre of the room.
I went there and found over eighty cells of the well-known Grove nitric-acid battery. The operator there, who was also agent, when asked by me if I could have the electrodes of each cell, made of sheet platinum, gave his permission readily, thinking they were of tin. I removed them all, amounting to several ounces.
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