The Electric Executioner by H. P. Lovecraft and Adolphe de Castro

THE ELECTRIC EXECUTIONER (thelovecraftvault.bandcamp.com/album/the-elect…) is a short story by Lovecraft and Adolphe de Castro, first published in the August 1930 edition of Weird Tales. "An investigator for a mining colony finds himself at the mercy of a deranged inventor's bizarre killing machine."