for an exit. Hale started in pursuit. He was almost upon the animal again, when, leaping up from his grasp, it landed on a low shelf where chemicals were stored. Several bottles fell, filling the room with fumea.
Another bottle fell, and, suddenly, amid a thunderous roar, the ceiling and walls began falling. Some highly explosive chemical had been stored in one of the bottles.
Hale was thrown violently against the couch. His hand touched Aña's body. One last shred of consciousness enabled him to pick her up and drag her out. In the open, he fell, aware, before blackness descended, that flames leaped high over the laboratory building and that Unani Assu lay dead within.
HALE and Aña, leaning over the deck-rail of a small steam launch, gazed into the dark waters of the Amazon.
"We ought to reach Para by morning," said Hale, "and then, dearest, we're off for New York!"
Aña, wearing one of the first civilized dresses she had ever donned, and looking as smart as any débutante, slipped her little hand into her husband's.
"Isn't it a shame, Hale," she moaned, "that the fire burned all the animals and insects, the machinery, and even your notes?" Her beautiful face saddened. "Just one or two specimens might have been proof enough for your What-You-Call-It Club!"
"The Nescience Club, darling. No, I can't expect to win the Woolman prize, but I've won a prize worth far more." He squeezed her little hand and looked devotedly into her blue eyes. "And, Aña, I've reasoned out something concerning mind-electrons which even Sir Basil overlooked."
"What is it, Hale?"
"He maintained that matter seeks always to enslave mind-electrons, but I am convinced that mind-electrons seek to enslave matter. Understand? It's creation, Aña! Had Sir Basil succeeded in broadcasting death throughout the world, the freed mind-electrons, as in the beginning, would have started again to vitalize inorganic atoms. And, in a few million years, which is no time to the Mind, the world would be humming with a new civilization. Large thought, eh, sweetheart?"
A SIGNAL TO THE MOON
THE idea of a radio signal to the moon may sound fantastic, but is easily within the range of possibility, says Dr. A. Hoyt Taylor, Chief of the Radio Division of the United States Naval Research Laboratories at Washington, who plans such an attempt in the near future.
"We have reason to expect a good chance of getting the signal back in a time interval of slightly less than three seconds," said Dr. Taylor.
To be exact, a radio signal should be reflected back to earth in a time interval of 2.8 seconds, this being the necessary elapsed time for it to carry the 250,000 miles to the moon and return at its speed of 300,000 kilometers, or 186,000 miles per second.
The signal would be very weak, Dr. Taylor points out, but not impossible of detection with the present refinement of receiving instruments, provided no great absorption took place in interstellar space.
A high frequency wave will be used, as such a wave penetrates readily the earth's atmosphere and probably goes far beyond. The frequency of the wave will range between 20,000 and 30,000 kilocycles. Twenty kilowats of power will be used, enough to furnish current for about forty flatirons.
The value of a radio signal to the moon lies in the confirmation of whether there is or not heavy absorption of waves in the upper levels of our own atmosphere. If successful it would indicate a reasonably good reflection coefficient at the surface of the moon—the power of the moon's surface to act as a joint agent in the perfection of the signal.
The signal might have some bearing also on whether the moon has an atmosphere—something pretty much settled already by astronomical observation. It would also lead to the possibility of fairly accurate determination of wave velocity in free space, all of interest to science, either confirming existing theories or establishing new ones.
