"As a matter of fact, the Tele-motor-coasters would not be possible were it not for the metallic streets. The flat spring which trails on the street between the two rear wheels must make continuous contact with the metallic 'ground,' else the current cannot flow."
"But where does the current come from?" asked the girl.
"You have perhaps noticed already the white slender posts at the edge of the sidewalk, and on their tops umbrella-like insulators which carry a thick spiked wire. This wire, as you see, is about fifteen feet above the curb and carries the high frequency current which not only supplies our coasters with power, by way of our needle collectors, but also propels all the vehicles which you see gliding so noiselessly."
They were well under way and rolled along at a speed of abo
