outh bay or
machine shop for machine-tool work. The telpherage system extends
across the transfer table pit at the west end of the shops and into
the storehouse and blacksmith shop at the Seventh Avenue end of the
grounds.

The traveling telpherage hoist has a capacity of 6,000 pounds. The
girders upon which it runs consist of 12-inch I-beams, which are hung
from the roof trusses. The car has a weight of one ton and is
supported by and runs on the I-beam girders by means of four 9-inch
diameter wheels, one on each side. The hoist is equipped with two
motors. The driving motor of two horse power is geared by double
reduction gearing to the driving wheels at one end of the hoist. The
hoist motor is of eight horse power, and is connected by worm gearing
and then by triple reduction gearing to the hoist drum. The motors are
controlled by rheostatic controllers, one for each motor. The hoist
motor is also fitted with an electric brake by which, when the power
is cut off, a band brake is applied to the hoisting drum. There is
also an automatic cut-out, consisting of a lever operated by a nut,
which travels on the threaded extension of the hoisting drum shaft,
and by which the current on the motor is cut off and the brake applied
if the chain hook is wound up too close to the hoist.

[Sidenote: _Heating and
Lighting_]

The buildings are heated throughout with steam, with vacuum system of
return. The steam is supplied by two 100 horse power return tubular
boilers, located at the southeastern corner of the building and
provided with a 28-inch stack 60 feet high. The heat is distributed at
15 pounds pressure throughout the three bays by means of coil
radiators, which are placed vertically against the side walls of the
shop and storeroom. In addition, heating pipes are carried through the
pits as already described. The shops are well lighted by large windows
and skylights, and at night by enclosed arc lights.

[Illustration: INTERIOR VIEW OF 148TH STREET REPAIR SHOPS]

[Sidenote: _Fire
Protection_]

The shops and yards are equipped throughout with fire hydrants and
fire plugs, hose and fire extinguishers. The water supply taps the
city main at the corner of Fifth Avenue and 148th Street, and pipes
are carried along the side of the north and south shops, with three
reel connections on each line. A fire line is also carried through the
yards, where there are four hydrants, also into the general storeroom.

[Sidenote: _Gen