My original tumblr post was here. Attentive readers of Erotic Mad Science will note that this particular illustration has also been the subject of a pulp art recreation. This image was researched by Bacchus at ErosBlog as part of the “Δ commission.” The research was originally published at Hedonix as “Δ 061 – Alien Experimenters.” Here is what Bacchus found.

This artwork is cropped and photoshopped from the cover of the November 1939 issue of Uncanny Tales magazine:

PulpArtists.com credits the art on this cover to J. W. Scott, a prolific pulp artist and magazine illustrator from Camden, New Jersey.