“Edison Tube” Electrical Distribution Cable

vintageradio 2) Electricity Sparks Invention (1800-1900), 3) The Beginning of Radio and the Wireless Era (1853-1920), collections

This underground cable was installed by Thomas Edison in 1883 to carry 220 volts D.C. from Edison’ first power plant located on Pearl Street in New York city to customers within a square mile area of Manhattan.  It was discovered during excavation following the 9/11 terrorist attack on the World Trade Center. A cross section of the cable is shown …

Herzian Wave Radiator and Resonator

Eric Shew 3) The Beginning of Radio and the Wireless Era (1853-1920), collections

MICHAEL FARADAY was the first to propose the concept of an electromagnetic field – lines of force which spread out in all directions to fill space, and to affect matter within that space. It was James Clerk Maxwell, however, who built the theoretical bridge from electricity to radio.  Intrigued by Faraday’s work,  Maxwell developed a set of equations to describe …