could not be in the cyc chamber itself to watch. As it was, it would have been no more dangerous for Les to stand in the radioactivity-laden cyclotron room than it was for him here in what all cyclotron mechanics considered more than safe from harm.

As the neutrons raced invisibly into the new element, a tiny, glistening sphere expanded, millimeter by millimeter. It was a strange field of energy, a true freak of Nature. Unpredicted and unknown, it hovered at nine centimeters radius as the sample swallowed neutrons by the uncounted million. It expanded again, slowly, slowly, slowly until the critical proportion of sample and transmuted nuclei was attained.

Then the glistening sphere of energy expanded with an acceleration that drove it to the ends of the infinite universe in a matter of microseconds. Too swift to be seen, to register—if there had been a means of detecting it—and too swift even to leave a trace of evidence on the physical universe.

Its effect, however, was evident to Ackerman. The others who came later saw only what they found remaining. Les was on the spot, and saw the dual effect of the bombardment of Element X by neutrons.

His notebook gave the first sight of unreality. Like a double exposure, or a photomontage, he saw page after page curl up in charred destruction—curling up wraithlike out of a complete and unharmed volume! He saw the solid concrete blocks rave into incandescence—flying in terrible fury out of the unharmed wall; each brick as it exploded separating ghostlike from its unharmed twin. The laboratory exploded in a mighty pillar of flame and fire—rising seventy thousand feet into the sky but mushrooming upward from the placidly unharmed ghostly replica of itself. The light from the explosion was all-blinding, yet the calm moonlight still cast its mellow shadow over the unharmed buildings. The explosion shocked fleecy clouds into falling rain—rain that fell from the serenely existing sky of the other—other—other what?

Ackerman found himself standing on the sterile land that surrounded the laboratory, simultaneously watching the boiling cloud above and the moonlit laboratory below. He was puzzled, somewhat afraid to go close to the possible effect of the nuclear explosion; yet there was the fact that at least in one existance the laboratory was unharmed.

He waited, wondering. The passage of time did not seem to bother him. Previously, Ackerman had been tired, and more than glad that this was the last job of the evening. Now he was 

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