One signal and one manipulation, and the Aerocar described the first motion. A second signal and manipulation, and it described the other. "Now we will ascend, first by the reverse angle and then by the perpendicular." Again the signals and again the manipulations, and again the exact movements through space. "If your flying machine and airship builders could do that, what would your people think?" "That the world had been revolutionized." "But the world will not be thus revolutionized until science is freed of gross materialism and human aspiration becomes something higher than selfish greed, commercialism, war, conquest, opulence, and the despotisms they engender. You must expel all the gods with whom you most closely commune, before you may commune with the true God or Supreme Principle of the Universe." In the meantime the Curator's Aerocar had rejoined its consorts, and we floated away to the northeast, where a great semicircle of mountains were dimly outlined, and then descended upon a city looking like a pearl in a semicircular valley, bisected by a broad river, spanned with bridges at short intervals as far as the vision reached. With my watch I had timed the voyage. It had lasted two hours and thirty minutes. "How far have we traveled?" I inquired of Remo. "One thousand of your miles." "That is four hundred miles to the hour; six and two-thirds miles each minute." "The speed might easily have been doubled." My amazement was unbounded, but I did not doubt Remo's statement then. Later, I recognized it as an easy possibility. Remo detained me until the rest of the company had left the Aerocar, and then said abruptly: "You would learn the secret of the motive principle that moves our mechanical devices and performs other offices which seem to you miraculous. It is this: It is the electric current which we take direct from the atmosphere at will--electricity, which is the life-giving, life-preserving and life-promoting principle, the superior and fountain of all law affecting the material Universe and intervening space. To command that is to command everything. "This is the capital of my Curatorship. Here all my predecessors have served the Commonwealth; hither all my successors will come. Here every mechanical device is tested, approved or rejected, and from hence their production is directed, as a public right, in every municipal division of the Commonwealth. "Nearly every monument you have seen, as you have doubtless noticed, is dedicated to some Chosen Son of Wisdom, and some of them date back tens of centuries. Whoever makes a great discovery, such as taking the electric current direct, or dividing its capabilities into useful and necessary directions, or perfects some great mechanism, securing the full beneficence of the current, brings it here and dedicates it to the Commonwealth and its sons and daughters. Its benefits are common to all.