[_Continued from first page._]
escape through the jet, L. This produces a partial vacuum at L, and
draws air in at C. The air and steam pass with great rapidity through
the tube, G. The action of the air and steam produces another
partial vacuum at N, which draws gasoline in through the pipe, B. The
adjustment of the opening is such that one pound of steam draws in air
sufficient for two pounds of gasoline. The heat of the steam is taken
up by the refrigeration caused by the evaporation of the gasoline, so
that at E the compound is carbureted air and cold water. The tube, F,
presents the curious phenomenon of being hot at _a_ and cold at _b_.
In one short piece of tube we have a hot retort and a cold condenser.
The supply of gasoline is regulated by the valve, D. The dash pot,
H, prevents a too rapid action of the valve, I. Gas of any desired
density may be made, and when once adjusted the gas does not vary. The
burner used with this machine is made to produce the very best results
attainable, and then the gas is regulated to a density and pressure
to suit the burner. The nuisance of an adjustable burner is thus
obviated.
The holder closes off the supply when full, and lets on a supply when
nearly empty. Gasoline has been much improved within a few years. It
is now so very cheap that the equivalent of one thousand feet of coal
gas of standard quality may be equaled for sixty cents. Where no steam
is at hand these machines are run with a small oil burner. They are
being made by the Pennsylvania Globe Gas Light Co., 131 Arch St.,
Philadelphia, Pa., of from 100 to 10,000 burner power.
This machine was patented June 8, 1880.
[Illustration: Fig 2.