Hydrogen Balloons Could Elevate Telegraph Wires above Rivers
Share this on WhatsApp Originally published in November 1845 Credit: Scientific American Advertisement “A new method has been proposed for extending the lines of the Magnetic Telegraph across rivers and bays. It is proposed to support the wires in an elevated position, by means of elliptic balloons. These balloons, being each 60 feet in length, … Continue reading Hydrogen Balloons Could Elevate Telegraph Wires above Rivers
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