In the second
place, when the gas issues from a suitable self-luminous burner under
proper pressure, the acetylene flame is perfectly steady; and in this
respect it in preferable to most types of electric light, to all self-
luminous coal-gas flames and candles, and to many varieties of oil-lamp.
In steadiness and freedom from flicker it is fully equal to incandescent
coal-gas light, but it in distinctly superior to the latter by virtue of
its complete freedom from noise. The incandescent acetylene flame emits a
slight roaring, but usually not more than that coming from an
atmospheric coal-gas burner. With the exception of the electric arc,
self-luminous acetylene yields a flame of unsurpassed intensity, and yet
its light is agreeably soft. In the third place, where electricity is
absent, a brilliancy of illumination which can readily be obtained from
self-luminous acetylene can otherwise only be procured by the employment
of the incandescent system applied either to coal-gas or to oil; and
there are numerous situations, such as factories, workshops, and the
like, where the vibration of the machinery or the prevalence of dust
renders the use of mantles troublesome if not impossible.
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