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He followed to the small, far-spaced hut now snow-buried to its eaves in which the seismograph ticked away to itself. "I think I'm going crazy," said the geophysics man. "Did you ever hear of a ground-shock starting inside out?" He pointed to the graph-paper that fed very, very slowly past the seismograph's pens. The recording did look odd.
Are biophysics and geophysics one and the same? One may freely admit that there cannot be two kinds of physics, nor two kinds of chemistry not one kind for a rock, and another kind for a tree, or a man. There are not two species of oxygen, nor two of carbon, nor two of hydrogen and nitrogen one for living and one for dead matter.
There was a supply-plane on the runway, but the helicopter belonged at the base. He found himself excessively conscientious in his check-over. Though he hated to admit it, he knew it was because Gail would be in the plane. When he headed back toward the main building one of the geophysics gang beckoned to him.
But except for that one way of making it, all waves absolutely all wave-systems start out with a crest and a trough behind it. Everywhere, all the time, unless you do what I said in a bathtub." "I'm a shower man, myself," observed Soames. "But go on." "This," said the geophysics man bitterly, "is like a bathtub wave. See? The ground was jerked away, and then pushed back.
"If you put your hand just under the surface of the water in a bathtub," said the geophysics man harassedly, "and jerk it downward, you get a hollow that spreads out with a wave behind it. It's the exact opposite of dropping a pebble into water, which makes a wave that spreads out with a hollow a trough behind it.
"Are you saying," Soames asked after a moment, "that ordinary earth-tremors record like explosion-waves, but that you'd have to have an implosion to make a record like this?" "Sure!" said the geophysics man. "But how can you have an implosion that will make an earth-shock? I'm going to have to take this whole damned wabble-bucket apart to find out what's the matter with it!
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