ontains the repeating coils. The cables leading
from the opening in the ceiling to the right-hand side of the
intermediate distributing frame are the answering-jack cables, and from
the terminals on this side of this frame other cables pass in smaller
groups to the relay terminals on the relay racks which lie between the
intermediate frame and the coil rack.

The power board is shown at the extreme right. The fuse panel at the
left of the power board contains in its lower portion fuses for the
battery supply leads to the operator's position and to private-branch
exchanges, and in its upper portion lamps and fuses for the ringing
generator circuits for the various operators' positions and also for
private-branch exchanges.

At the lower left-hand portion of this view is shown the battery
cabinet. It is the practice of the New York Telephone Company not to
employ separate battery rooms, but to locate its storage batteries
directly in the terminal room and to enclose them, as shown, in a wooden
cabinet with glass panels, which is ventilated by means of a lead pipe
extending to a flue in the wall.

One unit of charging machines, consisting of motor and generator, is
shown in the immediate foreground. A duplicate of this unit is employed
but is not shown in this view. The various ringing and message register
machines are shown beyond the charging machines. Three of these smaller
machines are for supplying ringing current and the remainder are for
supplying 30-volt direct current for operating the message registers.
One of the machines of each set is wound to run from the main storage
battery in case of a failure of the general lighting service from which
the current for operating is normally drawn.

[Illustration: Fig. 428. Terminal Apparatus. Chelsea Office]

[Illustration: Fig. 429. Floor Plan, Automatic Office, Lansing,
Michigan]

Another view of the terminal-room apparatus is given in Fig. 428. This
is taken from the point marked _B_ on the floor plan of Fig. 423. At the
right may be seen the message registers on which the calls of the
subscribers in this office are counted as a basis for the bills for
their service. At the extreme left is shown the private-line test board.
Through this board run all of the lines leased for private use, and also
all of the order wire or call lines passing through this office. The
purpose of such an arrangement is to facilitate the testing of such line
wires. At the right of this p