J. M. Walsh

antigravity adj.	1932 J. M. Walsh Vanguard to Neptune in Wonder Stories Quarterly Spring 311/1 But the antigravity apparatus will have to be capable of generating a greater repulsive force than is required for ordinary interplanetary conditions.
Neptunian n. 2	1932 J. M. Walsh Vanguard to Neptune in Wonder Stories Quarterly Spring 849/2 They appeared not altogether unacquainted with the planet men, and, presently, for we still found considerable difficulty with the Neptunian tongue, we gathered that this was not the first occasion on which such visitors had appeared on the planet.
Venusian n. 2	1931 J. M. Walsh Vandals of Void in Wonder Stories Quarterly Summer xxv. 570/1 A babble of voices came to me. Most of what was said, being in Venusian, was unintelligible, but presently I found a man who could speak Earth English—he had made one or two trips to our planet—and through him I was able to communicate.
vision plate n.	1932 J. M. Walsh Vanguard to Neptune in Wonder Stories Quarterly Spring 309/2 ‘I say, skipper,’ said the man whose face showed in the vision-plate, ‘what are you doing there? Someone monkeying with things?’