The water will be partly heated in these reservoir tanks by means of
hot water discharged from high-pressure steam traps. In this way the
heat contained in the drainage from the high-pressure steam is, for
the most part, returned to the boilers. From the reservoir tanks the
water is conducted to the feed-water pumps, by which it is discharged
through feed-water heaters where it is further heated by the exhaust
steam from the condensing and feed-water pumps. From the feed-water
heaters the water will be carried direct to the boilers; or through
the economizer system to be further heated by the waste gases from the
boilers.

[Illustration: PORTION OF MAIN STEAM PIPING IN PIPE AREA]

Like the steam-pipe system, the feed-water piping is laid out on the
sectional plan, the piping for the several sections being identical,
except for the connections from the street service to the reservoir
tanks. The feed-water piping is constructed wholly of cast iron,
except the piping above the floor line to the boilers, which is of
extra heavy semi-annealed brass with extra heavy cast-iron fittings.

[Sidenote: _Engine and
Turbine
Equipment_]

The engine and turbine equipment under contract embraces nine 8,000 to
11,000 horse power main engines, direct-connected to 5,000 kilowatt
generators, three steam turbines, direct-connected to 1,875 kilowatt
lighting generators and two 400 horse power engines, direct-connected
to 250 kilowatt exciter generators.