occasionally reversing the flow of the steam and petroleum. However
efficacious such a method might prove, the apparatus as we have
described it can be very easily applied to any generator. Fig. 2
represents it as applied to the front of a furnace provided with two
doors. A metallic box, with two compartments, is placed on one side of
the furnace, and is provided with two stuffing boxes that are capable
of revolving around the steam and petroleum pipes. The latter thus
form the pivots of the hinge that allows of the play of the vaporizers
and piping.

[Illustration: FIG. 2--THE BURNER APPLIED TO THE FURNACE OF A BOILER.]

It was in this way that Mr. Dietrich arranged his apparatus in an
experiment made upon a stationary boiler belonging to a Mr. Corpet.
The experiment was satisfactory and led to the adoption of the
arrangement shown in Fig. 3. The fire bridge is constructed of
refractory bricks, and the majority of the grate bars are filled in
with brick. The few free bars permit of the firing of the boiler and
of access of air to the interior of the fire box. Under such
circumstances, the combustion is very regular, the furnace does not
roar, and the smoke-consuming qualities are perfect.

[Illustration: FIG. 3--APPLICATION OF THE BURNER TO A RETURN FLAME
BOILER.]

In the experiment on the Flamboyante, the boiler was provided with but
one apparatus, and the grate remained covered with a layer of ignited
coal that had been used for firing up in order to obtain the necessary
pressure of steam to set the vaporizer in operation. This ignited coal
appeared to very advantageously replace the refractory bricks, the