Here is one even I have been afraid to fettle and attempt to run. Marked PAT APLD FOR on the tube behind the upright burner stub. There's a long zig-zag metal piece in the cylinder to give maximum surface for fuel evaporation. Lamp is about three and a half feet tall. Anybody know anything about it??? Crack the valve and let 'er drip. Draft adjustment at the ring plug on the bottom. Truly a pyro's dream.