ne was in a Boston paper, September, 1860.
John A. Bassett, by patent March 2, 1862, developed the use of the petroleum liquid, which gives the carburetor its practical value, the gas-tar products being expensive and difficult to manage.
Levi Stevens, December 20, 1864, passed the air through a shower of the liquid, which was dropped into the vaporizer in measured quantities.
Irwin introduced a feature (April 11, 1865) founded on the fact that the hydrocarbon vapor conferred greater gralder, the inverted cylinder whose lower edge is immersed in the water of an annular chamber.
Prichard forced the air by water under pressure, admitted below to expel the air from the chamber.
Douglas's has a rotary fan.
Levi Stevens's has a meter-wheel, whose shaft has its bearing below the center of the partition dividing the meter and regulation chambers, and gears with a wheel on the regulator-shaft, which has a bearing at the center of the partition.