1 Soot is usually the product of the imperfect combustion of fuel.
2 The energy is released by combustion on the application of a match.
3 Secondly, new fuels for the internal combustion engine which do not involve the depletion of vital and limited energy resources.
4 When a scientist studies combustion, he peers though his instruments at one of the million aspects of the one great mystery.
5 This showed that the more we condense air the fitter we make it for purposes of combustion.
6 The byproduct of the engine's combustion process is almost exclusively water vapor, which comes out of an exhaust pipe.
7 The soup and fish were in the last stage of projection, and the cook hung over her crucibles in a frame of mind and body threatening spontaneous combustion.
8 After the recent outbreak of fires in private homes, the fire commissioner ordered that all combustible materials be kept in safe containers.
9 The ability of coal to release a combustible gas has long been known.