Light carbureted hydrogen

from The Collaborative International Dictionary of English v.0.48
Carbureted \Car"bu*ret`ed\, a.
   1. (Chem.) Combined with carbon in the manner of a carburet
      or carbide.
      [1913 Webster]

   2. Saturated or impregnated with some volatile carbon
      compound; as, water gas is carbureted to increase its
      illuminating power. [Written also {carburetted}.]
      [1913 Webster]

   {Carbureted hydrogen gas}, any one of several gaseous
      compounds of carbon and hydrogen, some of with make up
      illuminating gas.

   {Light carbureted hydrogen}, methane ({CH4}), also called
      {marsh gas}, and {fire damp}.
      [1913 Webster +PJC] Carburetor
    

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