I've recently seen the term "aneucapnic" (what a great word!) as the description of a type of wick oil lamp. There is mention here: Book Reviews, Sites, Romance, Fantasy, Fiction | Kirkus Reviews However, considering the web will generally provide more information than you want on the most obscure subject, I can find very little about the aneucapnic lamp. OED definition: aneucapnic lamp, n. : Oxford English Dictionary So far, I have found that it was a patent type of smokeless lamp made by the scottish company Rowett in the 19th(?) century. The word aneucapnic being the greek for smokeless. As far as I can determine, it was made such that air is fed directly to be base of the flame meaning that there is no need for a chimney to draw it. So, instead of needing a slim chimney it would work just as well with a larger bowl-type alone, just to shield the flame from draughts and for appearance. The only descriptions I can find of the burner is in the OED definition above: "A type of smokeless oil lamp having two metallic globes over the wick that serve to conduct air to the flame, avoiding the need for a chimney". I can't really visualise the "two metallic globes" and wonder what such a burner must look like? In the first reference above, it is contrasted with "the modern, double-burner, chimney type", so it seems not to be like the single wick and duplex lamps that are common. Can anyone shed any further light on this please (pun intended)? I would very much like to see a photo of an original Rowett's Aneucapnic if anyone can help please. As before, my web searches for the same have not been very successful.