acting against gravity
By means of the ‘R.Force’, or Anti-Gravitational Force, of the secret of which Lord Redgrave is the sole possessor, they are able to navigate with precision and safety the limitless ocean of space.
Our anti-gravitational screen still let through some of the gravitational waves, or fifty per cent of the energy, which we could not seem to counteract.
If one could discover some substance that would insulate from gravity, but an infinitesimal amount of energy would be required to lift a ton weight. Now kick the nullifying screen out of the way. As the mass crashes to the ground it could be hitched to machines and made to do useful work. Since the process, presumably, could be repeated over and over again, we should attain the equivalent of perpetual motion. Since this is impossible, I feel sure that inert anti-gravitational screens are impossible.
I finished my descent of the cliff by the use of an anti-gravitational device.
Their spherical planes, flown by antigravitational force, shot into the air, and scattered immediately, to form in threatening squadrons over the four army divisions guarding the Death Valley ‘exit’.
The final clue to the antigravitational nature of the field came when they shot a rifle bullet into it and observed the trajectory with a high-speed camera.
She was looking for more information about four members of a twentieth century space crew whose first attempt to man an antigravitational spacecraft was commemorated…by a minute’s silence during a TV news report.
George Griffith, A Visit to the Moon
Cory Panshin submitted a cite from a 1979 reprint of George Griffith's "A Visit to the Moon"; Ralf Brown verified this in its 1900 serialization in Pearson's Magazine.
Mike Christie submitted a 1956 cite from Arthur C. Clarke's "What Goes Up".
Jeff Prucher submitted a 1931 cite from Clark Ashton Smith's "An Adventure in Futurity".
Jeff Prucher submitted a 1930 cite from Donald Menzel's article "The Equivalent of Perpetual Motion" in Science Wonder Stories.
Mike Christie submitted a 1938 cite from Arthur J. Burks' "The Challenge of Atlantis".
Last modified 2020-12-16 04:08:47
In the compilation of some entries, HDSF has drawn extensively on corresponding entries in OED.