The following extract from my
communication to the Gas Institute will give all particulars as to the
constructive detail of this burner. Those who wish to go further into
the matter will find the paper referred to in the publication of the
Gas Institute for the current year, and also in the _Journal of Gas
Lighting_, June 26, 1883, and the _Review of Gas and Water Engineering_,
June 16, 1883.
"The first and most important part is the mixing chamber or tube, one
end of which is supplied separately with gas and air, which at the other
end are, or should be, delivered as a perfect mixture. It may be taken
as a rule that this tube, if horizontal, should not be less in length
than four and a half times or more than six times its diameter. It is
a common practice to diminish or make conical-shaped tubes. All my
experience goes to prove that, excepting a very trifling allowance for
friction, the area of the smallest part of the tube rules the power, the
value of the mixing-tube being no more than that of the smallest part.
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