Magnetic Storms Power Telephone Wires

Originally published in June 1869

Magnetic Storms Power Telephone Wires
Credit: Scientific American

“On the evening of the 15th of April a magnetic storm of unusual force prevailed over the entire northern section of the country, which so seriously affected the operation of the wires that, on some circuits, they could only be worked by taking off the batteries and employing the auroral current instead. The effect of this great disturbance of the earth’s magnetism was manifested with particular power upon the wires between New York and Boston, and for several hours the lines upon this route depended entirely upon this abnormal power for their working current.”

Scientific American, June 1869

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