My original tumblr post was here. This image is the cover of Super Science Stories (January 1950). The cover is by Lawrence Sterne Stevens and the ISFDB entry for the issue is here. The image was first posted on Tumblr by Vintage Geek Culture.
Tumblr favorite #2633: The fiction of tomorrow today!
I see an L. Ron Hubbard story listed. None of his fiction was as weird as what came later.
It was Beyond All Weapons. Short story about Firsten Guide (what a name) and his special physics defying engine. very pulpy story.