stenings, and special fire brick
for lining same.

Bridge wall girder for hanging bridge wall with expansion sockets for
side walls.

A full set of access and cleaning doors through which all portions of
the pressure parts may be reached.

A swing damper and frame with damper operating rig.

There are also supplied with each boiler a wrench for handhole nuts, a
water-driven turbine tube cleaner, a set of fire tools and a metal steam
hose and cleaning pipe equipped with a special nozzle for blowing dust
and soot from the tubes.

Aside from the details of design and construction as covered in the
foregoing description, a study of the illustrations will make clear the
features of the boiler as a whole which have led to its success.

The method of supporting the boiler has been described. This allows it
to be hung at any height that may be necessary to properly handle the
fuel to be burned or to accommodate the stoker to be installed. The
height of the nest of tubes which forms the roof of the furnace is thus
the controlling feature in determining the furnace height, or the
distance from the front headers to the floor line. The sides and front
of the furnace are formed by the side and front boiler walls. The rear
wall of the furnace consists of a bridge wall built from the bottom of
the ashpit to the lower row of tubes. The location of this wall may be
adjusted within limits to give the depth of furnace demanded by the fuel
used. Ordinarily the bridge wall is the determining feature in the
locating of the front baffle. Where a great depth of furnace is
necessary, in which case, if the front baffle were placed at the bridge
wall the front pass of the boiler would be relatively too long, a
patented construction is used which maintains the baffle in what may be
considered its normal position, and a connection made between the baffle
and the bridge wall by means of a tile roof. Such furnace construction
is known as a "Webster" furnace.

[Illustration: Longitudinal Drum Boiler--Front View]

A consideration of this furnace will clearly indicate its adaptability,
by reason of its flexibility, for any fuel and any design of stoker. The
boiler lends itself readily to installation with an extension or Dutch
oven furnace if this be demanded by the fuel to be used, and in general
it may be stated that a satisfactory furnace arrangement may be made in
connection with a Babcock & Wilcox boiler for burning any fuel, solid,
liqui