sed
Air_]

The power house will be provided with a system for supplying
compressed air to various points about the structure for cleaning
electrical machinery and for such other purposes as may arise. It will
also be used for operating whistles employed for signaling. The air is
supplied to reservoir tanks by two vertical, two-stage,
electric-driven air compressors.

[Sidenote: _Oil System_]

For the lubrication of the engines an extensive oil distributing and
filtering system is provided. Filtered oil will be supplied under
pressure from elevated storage tanks, with a piping system leading to
all the various journals. The piping to the engines is constructed on
a duplicate, or crib, system, by which the supply of oil cannot be
interrupted by a break in any one pipe. The oil on leaving the engines
is conducted to the filtering tanks. A pumping equipment then
redelivers the oil to the elevated storage tanks.

All piping carrying filtered oil is of brass and fittings are inserted
at proper pipes to facilitate cleaning. The immediate installation
includes two oil filtering tanks at the easterly end of the power
house, but the completed plant contemplates the addition of two extra
filtering tanks at the westerly end of the structure.

[Sidenote: _Cranes, Shops,
Etc._]

The power house is provided with the following traveling cranes: For
the operating room: One 60-ton electric traveling crane and one 25-ton
electric traveling crane. For the area over the oil switches: one
10-ton hand-operated crane. For the center aisle of the boiler room:
one 10-ton hand-operated crane. The span of both of the electric
cranes is 74 feet 4 inches and both cranes operate over the entire
length of the structure.

The 60-ton crane has two trolleys, each with a lifting capacity, for
regular load, of 50 tons. Each trolley is also provided with an
auxiliary hoist of 10 tons capacity. When loaded, the crane can
operate at the following speeds: Bridge, 200 feet per minute;
trolley, 100 feet per minute; main hoist, 10 feet per minute; and
auxiliary hoist, 30 feet per minute. The 25-ton crane is provided with
one trolley, having a lifting capacity, for regular load, of 25 tons,
together with auxiliary hoist of 5 tons. When loaded, the crane can
operate at the following speeds: bridge, 250 feet per minute; trolley,
100 feet per minute; main hoist, 12 feet per minute; and auxiliary
hoist, 28 feet per minute.

The power house is provided wit