plant here given include that used on the principal contract and
terminal power station only. The power-generating plant given under
the horse-and-truck period was doubled at the beginning of the
train-disposal period, but it was still insufficient for the work then
under contract, and the additional contracts necessitated a greater
increase. The location had also to be changed to permit the excavation
of the rock under Ninth Avenue. The old stone church fronting on 34th
Street, between Seventh and Eighth Avenues, a building 68 ft. wide and
92 ft. long, made a roomy and very acceptable compressor-house. The
wooden floors and galleries were removed, and good concrete foundations
were put in, on which to set the plant; the walls, which were cracked in
several places, were trussed apart and prevented from moving outward by
cables passed about the pilasters between the windows.

The boilers were erected south of the church, an ash-pit being first
built, the full width of it, with the floor on a level with the
basement. The rear wall of the church formed the north wall of the
ash-pit, and the south wall and the ends were built of concrete. The
boilers were set with the fire-doors toward the rear wall of the
building, and 7 ft. distant from it, and above this fire-room and the
boilers there was erected a coal-bin of 500 tons capacity. The rear wall
of the compressor-house formed the north wall of the bin, the section
of which was an isosceles right-angled triangle. Coal was delivered by
dumping wagons into a large vault constructed under the sidewalk on 34th
Street, and was taken from there to the bin by a belt conveyor.

The plant for the second period was as follows:

_1._--_Central Plant._