Very mad science! This is Horror Stories for October-November 1939, cover artist unrecorded (shame!). This issue has no ISFDB entry; I found this version of the cover at this French-language collectors’ site.
Very mad science! This is Horror Stories for October-November 1939, cover artist unrecorded (shame!). This issue has no ISFDB entry; I found this version of the cover at this French-language collectors’ site.