schoolscienceproject.blogspot.in
Gas pipe
Roll a thin
piece of tin foil round a pencil to make a tube about four inches long, and
hold it with one end in the middle of a candle flame. If you hold a burning
match at the other end of the tube, a second flame will be lit there. Like all
solid and liquid fuels, stearin produces combustible gases when heated, and
these accumulate inside a flame. They burn, with the oxygen of the air, in the
outer layer and tip of the flame. The unburnt stearin vapour in the middle can
be drawn off, like town gas from the gas works.
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