"Everything starts as somebody's daydream. And, when you're daydreaming, it is science fiction. It's when you start work out how you put it together, true science fiction becomes real science."
`But the great difficulty is this,' interrupted the Psychologist. `You CAN move about in all directions of Space, but you cannot move about in Time.' `That is the germ of my great discovery. But you are wrong to say that we cannot move about in Time. For instance, if I am recalling an incident very vividly I go back to the instant of its occurrence: I become absent-minded, as you say. I jump back for a moment. Of course we have no means of staying back for any length of Time, any more than a savage or an animal has of staying six feet above the ground. But a civilized man is better off than the savage in this respect. He can go up against gravitation in a balloon, and why should he not hope that ultimately he may be able to stop or accelerate his drift along the Time-Dimension, or even turn about and travel the other way?'
L. Sprague deCamp wrote an enjoyable non-fiction piece on the way that language changes over time; see Language for Time-Travelers.
('Language of Time Travelers' by L. Sprague de Camp)
Compare to the the Dutch clock from The Clock That Went Backward (1881) by Edward Page Mitchell, the Anachronopete from El Anachronopete (1887) by Enrique Gaspar, precogs from The Minority Report (1956) by Philip K. Dick, the chronoscope from Legion of Time (1938) by Jack Williamson, and the time-telespectroscope from The Exile of Time (1931) by Ray Cummings.
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