; while
finally a few words will be said about the precautions necessary when
bringing a new system of pipes into use for the first time.
THE METER.--A meter is required either to control the working of a
complete acetylene installation or to measure the volume of gas passing
through one particular pipe, as when a number of consumers are supplied
through separate services under agreement from a central supply plant.
The control which may be afforded by the inclusion of a meter in the
equipment of a domestic acetylene generating plant is valuable, but in
practice will seldom be exercised. The meter records check the yield of
gas from the carbide consumed in a simple and trustworthy manner, and
also serve to indicate when the material in the purifier is likely to be
approaching exhaustion. The meter may also be used experimentally to
check the soundness of the service-pipes or the consumption of a
particular burner or group of burners. Altogether it may be regarded as a
useful adjunct to a domestic lighting plant, provided full advantage is
taken of it. If, however, there is no intention to pay systematic
attention to the records of the meter, it is best to omit it from such an
installation, and so save its initial cost and the slight loss of
pressure which its use involves on the gas passing through it.
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