junction of the floors and side walls a cement sanitary cove is
placed. The floors drain to catch-basins, and hose bibs are provided
for washing the floors.

[Illustration: BROOKLYN BRIDGE STATION]

Two types of ceiling are used, one flat, which covers the steel and
concrete of the roof, and the other arched between the roof beams and
girders, the lower flanges of which are exposed. Both types have an
air space between ceiling and roof, which, together with the air
space behind the inner side walls, permits air to circulate and
minimizes condensation on the surface of the ceiling and walls.

[Illustration: PLAQUE SHOWING BEAVER AT ASTOR PLACE STATION]

The ceilings are separated into panels by wide ornamental mouldings,
and the panels are decorated with narrower mouldings and rosettes. The
bases of the walls are buff Norman brick. Above this is glass tile or
glazed tile, and above the tile is a faience or terra-cotta cornice.
Ceramic mosaic is used for decorative panels, friezes, pilasters, and
name-tablets. A different decorative treatment is used at each
station, including a distinctive color scheme. At some stations the
number of the intersecting street or initial letter of the street name
is shown on conspicuous plaques, at other stations the number or
letter is in the panel. At some stations artistic emblems have been
used in the scheme of decoration, as at Astor Place, the beaver (see
photograph on this page); at Columbus Circle, the great
navigator's Caravel; at 116th Street, the seal of Columbia University.
The walls above the cornice and the ceilings are finished in white
Keene cement.