This is Marvel Tales for May 1940, with a cover by H.W. Scott. The ISFDB entry for this issue is here. I found this version of the cover at Pulp Covers, where the curators have made the entire issue available for download, and have also posted some interesting interior art, all of it uncredited, unfortunately. There is this, illustrating Nils O. Sonderlund’s “Mistress of Machine-Age Madness.”
This illustrating Robert Wentworth’s “World without Sex.” (As the illustration suggests, the story is something of a doozy and in publishing I’ve had to weigh its undoubted historical significance against whatever bullshit MRA types will generate out of it.)
This illustrating George E. Clark’s cover story “Test Tube Monster.” I like the conceit that by the year 1978 we’d be making beautiful women in test tubes.
And finally this illustrating Frederick Arnold Kummer, Jr.’s “Princess of Power.”