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She was scarcely aware that the track turned again inland until the beat of the horse's hoofs on the firm ground and an acceleration of speed showed her she had left the beach and the mysterious sea behind her, and she remembered that she was near the end of the first stage of her journey.

In but a space of seconds, so it seemed, it was sliding swiftly downward through the night-blue, and then was gone. And, almost directly, came the morning. And now there seemed to come a strange acceleration. The sun made one clean, clear sweep through the sky, and disappeared behind the Westward horizon, and the night came and went with a like haste.

Two inclined planes may have the same fall, but a ball will reach the bottom of one that is steepest near the top in less time than on any other, because the maximum acceleration is at the start.

Nor is it fair for us to measure the sagacity of our great jurists by the standard of modern experience. They lived before the acceleration of movement by electricity and steam. They could not foresee the rapidity and the profundity of the changes which were imminent.

Aboard the sleek craft, Tom Corbett relaxed after the tremendous blast-off acceleration and turned to look at the tense face of Kit Barnard who was seated in the pilot's chair. "Why don't you get some sleep, Kit?" said Tom. "I can take this baby over. It's the least I can do for all you've done for me." "Thanks, Tom, but I'll stay with it awhile longer," replied the veteran spaceman.

"Mechanical computers," he said, "have limits. They're designed to calculate a trajectory with constant acceleration or no acceleration. But that's all." Bors frowned. "What else could there be?" "Changing acceleration," said Logan condescendingly. "A mechanical computer can't compute that. But I can." Bors continued to frown.

Joe turned himself about very slowly, with his legs floating indecorously in entirely unintended kicks. He was breathing hard when he pulled himself into the chair and strapped in once more. "I'll take Communications," he told Mike as he settled his headphones. Reluctantly, Mike switched over. "Kenmore reporting to Communications," he said briefly. "We have ended our take-off acceleration.

"If they'll only stay scared until we get unloaded," said Joe in some satisfaction, "the government back home can tell them how many we were and what we came up for. But we'll probably make out all right, anyhow." "My crew will unload," said Brown, in conscious thoughtfulness. "You must have gotten pretty well exhausted by that acceleration." Joe shook his head.

I could of course, materialize beside you, under your protective screen, and crush you in a vise. I could materialize as a man of metal, able to stand up under this acceleration, and do you to death. I could even, by a sufficient expenditure of mental energy, materialize a planet around your ship and crush it.

Before his little ship broke up he'd been shaken intolerably, and his body had weighed half a ton. Where his safety-belt had held him, his body was one wide bruise. There'd been that killing acceleration when the ship split in two. The others except Mike were in as bad a case or worse. Haney and the Chief were like men who'd been rolled down Mount Everest in a barrel.