Hal K. Wells

Alpha Centaurian n.	1931 H. K. Wells When Moon Turned Green in Astounding Stories May 252/1 Over to the left of the dormant hybrids stood an Alpha Centaurian.
Centaurian n. 1	1931 H.K. Wells When Moon Turned Green in Astounding Stories May 253/2 The other Centaurian had come hurrying over now to aid its mate.
thought-reading machine n.	1931 H. K. Wells When Moon Turned Green in Astounding Stories May 253/1 He is going to put the thought-reading machine on your brain. Then he'll learn what the projectile is for, and everything will be lost!