It had two styli connected to pendulums joined to a wire and could reproduce writing on an electrically conductive surface.

FORBES: Eerily Prescient

Instead of jamming electrons through wire, generators convert them to microwave signals and fling these along the surface of the earth, between a system of relays spaced about 20 or 30 miles apart.

FORBES: The Trials Of Amory Houghton Jr.