J.M. Walsh:
Science Fiction Technology and Ideas
James Morgan Walsh (b. 1897 - d. 1952) was an Australian-born writer, in the UK from 1925. He was active as an author of short fiction from 1913, beginning to publish novels from 1921; he wrote some of his sf as by H Haverstock Hill.
Invention/Technology Source Work (Publication Date)

Antigravity - first use

The Vanguard of Neptune (1932)


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