Channing left for Venus Equilateral in two more days. They studied the barrier and established its height as a constant three hundred and thirty-nine, point seven six miles above Terra's mythical sea level. It was almost a perfect sphere, that did not change with the night and day as did the Heaviside Layer. There was no way to find out how thick it was, but thickness was of no importance, since it effectively stopped the beam. And as Don Channing stepped aboard the _Princess of the Sky_ to get home again, the project engineer said: "If you don't mind, I think we'll call that one the Channing Layer!" "Yeah," grinned Don, pleased at the thought, "and forever afterward it will stand as a cinder in the eye of Terran Electric." "Oh," said the project engineer, "We'll beat the Channing Layer." The project engineer was a bum prophet-- THE END.