Canned Heat was another word for Sterno, a cooking fuel based on denatured alcohol. Sterno was the trademark, Canned Heat the slugline. First cut as an instrumental. The Triangle Harmony Boys came from Alabama; that's where the harshest terpentine farms were located.
Sloppy Henry [real name: Waymon Henry; oldest vocal recording (for Okeh)]
Tommy Johnson [the original 'crossroads man' (see: Cross Road Blues) and the man credited for this one; Tommy was hooked on it; his Cool Drink Of Water gives another clue, with the opening line: "I asked her for water and she gave me gasoline"]
Chris Thomas King [on concept album around Tommy Johnson; Chris plays the part of Tommy in the brothers Coen film O Brother, Where Art Thou?]
The song naming the ultimate white blues band. Canned heat was what die-hard boozers drank when they ran out of moonshine.