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They were so deep a red that they were very near to black. Even Sirius, the flaming blue-white star was red. The darting Thessian ships were moving quite slowly now, moving at a speed that was easy to follow. Their rays, before ionizing the air brilliantly red, were now dark.

Their size is that of the electrons, and their velocity is generally greater than that of the cathode rays, while it may become almost that of light. They have about a hundred times less ionizing power than the alpha rays. The gamma rays were discovered by M. Villard.

But Baird regarded his radar screens. Microwaves penetrated the mist of rapidly ionizing gases. "Radar to navigation!" he said sharply. "The Plumie ship is still approaching, dancing as before!" The skipper said with enormous calm: "Any other Plumie ships, Mr. Baird?" Diane interposed. "No sign anywhere. I've been watching. This seems to be the only ship within radar range."

All wireless communication had to be abandoned, owing to the ionizing of the atmosphere, and up to the time this edition went to press had not been resumed. Telegrams by way of Colon report similar disturbances in South America. In New York the monument in Central Park known as Cleopatra's Needle was thrown from its pedestal and broken into three pieces.

They may be compared to the X rays; like the latter, they are not deviated by the magnetic field, and are also extremely penetrating. A strip of aluminium five millimetres thick will stop the other kinds, but will allow them to pass. On the other hand, their ionizing power is 10,000 times less than that of the alpha rays.

But amongst all the effects there is one which constitutes for the radiations taken as a whole, a veritable process for the measurement of radioactivity. This is their ionizing action on gases.

It was a machine to control weather. Something to do with broadcasting tremendously high voltages, ionizing the air and causing rain clouds to form or reversing the process and scattering clouds back into thin air. This was the Master Machine. All over the Earth, at spaced distances, were smaller replicas, substations, controlled from this one.

There was a feeling of awful power that seeped into the minds of the watchers, and held them spellbound before the glowing, opalescent sphere. The tons of matter were compressed now to a tiny ball! Suddenly the energy flared out violently, a terrific burst of energy, ionizing the air in the entire room, and shooting it with tiny, burning sparks. Then it was over.

She looked cool in the belted white coveralls, with the white turban bound around her yellow hair, and very beautiful, and when he saw her, his heart gave a little bump, like a geiger responding to an ionizing particle. It always did that, although they had been together for twelve years, and married for ten.

The aperture containing the ionizing mechanism was still open; I glanced within, The whirling ball of fire was not dimmed, but its coruscations, instead of pouring down through the cylinder, swirled and eddied and shot back as though trying to re-enter their source. Rador nodded grimly. "The Shadow takes its toll," he said. We topped a rise Larry gripped my arm. "Look!" he cried, and pointed.