...Melvin Sturgis is a mechanical engineer employed byROCKETDYNE, Propulsion field laboratory—a division of North AmericanAviation, Inc...
Melvin Sturgis 「The Unprotected Species」
...But his sensations as he first surged into thisnew habitat under Keane's propulsion were so weird and unearthly thatfor the moment he was lost in the wonder of the experience...
Victor Rousseau 「Astounding Stories of Super-Science January 1930」
...And, as a corollary, if a propulsion explosion cannot haveeffect in empty space, as presumed in the story, the spaceship must enter atmosphere before it can stop by firing itsbow tubes...
Various 「Astounding Stories, July, 1931」
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