Plate XLVII, Fig. 1.— TW 4, P.N.Y. & L.I.R.R. Terminal Station West. View of 9th Ave. looking Northwest from 32nd Street, prior to commencement of work. April 23, 06.

Plate XLVII, Fig. 2.— TW 17, P.N.Y. & L.I.R.R. Terminal Station West. View of East side of 9th Ave. looking North from a point 100 feet south of 33rd St. showing condition of work. July 23, 06.

Plate XLVII, Fig. 3.— TW 25, P.N.Y. & L.I.R.R. Terminal Station West. View showing permanent and temporary supports of 9th Ave. Structures, looking Northwest from 31st. St. April 24, 07.

Plate XLVII, Fig. 4.— TW 28, P.T. & T.R.R. Co. Terminal Station West. East side of 9th Avenue, North of 32nd St. looking West, showing rock excavation and supports of 9th Avenue structures. Aug. 17, 07.

[Fig. 1, Plate XLVII], shows the elevated railway structure and the street surface prior to the commencement of the work.

The east track is used for north-bound local trains, the west track for south-bound local trains, and the central track for south-bound express trains between 7 and 9.30 a.m. and for north-bound express trains between 2.30 and 7 p.m. It is said that an average of 90,000 passengers are carried over this structure every 24 hours.

Surface Railway Structure of the New York City Railway Company.—This is an electric surface railway of the ordinary type, the rail and slot being bedded in concrete, with cast-iron yokes every 5 ft. There are manholes every 100 ft., and cleaning-out holes every 15 ft. Power conduits are bedded in the concrete on the east side of the east track.