The head of the mantle should be of slighter
construction than that of coal-gas mantles. Fifthly, generators belonging
to the automatic variety, which in most forms inevitably add more or less
air to the acetylene every time they are cleaned or charged, appear to
have achieved most popularity in Great Britain; and these frequently do
not yield a gas fit for use with the mantle. This state of affairs, added
to what has just been said, makes it difficult to speak in very
favourable terms of the incandescent acetylene light for use in Great
Britain. But as the advantages of an acetylene not contaminated with air
are becoming more generally recognised, and mantles of several different
makes are procurable more cheaply, incandescent acetylene is now more
practicable than hitherto. Carburetted acetylene or "carburylene," which
is discussed later, is especially suitable for use with mantle burners.
ATMOSPHERIC ACETYLENE BURNERS.--The satisfactory employment of acetylene
in incandescent burners, for boiling, warming, and cooking purposes, and
also to some extent as a motive power in small engines, demands the
production of a good atmospheric or non-luminous flame, _i.
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