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