of support is such as to allow for expansion and contraction
without straining either the boiler or the brickwork and permits of
repair or renewal of the latter without in any way disturbing the boiler
or its connections.

The following features of design and of attachments supplied are the
same for all types.

FRONTS--Ornamental fronts are fitted to the front supporting frame.
These have large doors for access to the front headers and panels above
the fire fronts. The fire fronts where furnished have independent frames
for fire doors which are bolted on, and ashpit doors fitted with blast
catches. The lugs on door frames and on doors are cast solid. The faces
of doors and of frames are planed and the lugs milled. The doors and
frames are placed in their final relative position, clamped, and the
holes for hinge pins drilled while thus held. A perfect alignment of
door and frame is thus assured and the method is representative of the
care taken in small details of manufacture.

The front as a whole is so arranged that any stoker may be applied with
but slight modification wherever boilers are set with sufficient furnace
height.

[Illustration: Cross Drum Boiler Front]

In the vertical header boilers large wrought-iron doors, which give
access to the rear headers, are attached to the rear supporting frame.

[Illustration: Wrought-steel Inclined Header Longitudinal Drum Babcock &
Wilcox Boiler, Equipped with Babcock & Wilcox Superheater]

[Illustration: Automatic Drumhead Stop and Check Valve]

FITTINGS--Each boiler is provided with the following fittings as part of
the standard equipment:

Blow-off connections and valves attached to the mud drum.

Safety valves placed on nozzles on the steam drums.

A water column connected to the front of the drum.

A steam gauge attached to the boiler front.

Feed water connection and valves. A flanged stop and check valve of
heavy pattern is attached directly to each drumhead, closing
automatically in case of a rupture in the feed line.

All valves and fittings are substantially built and are of designs which
by their successful service for many years have become standard with The
Babcock & Wilcox Co.

The fixtures that are supplied with the boilers consist of:

Dead plates and supports, the plates arranged for a fire brick lining.

A full set of grate bars and bearers, the latter fitted with expansion
sockets for side walls.

Flame bridge plates with necessary fa