The illustration on page 122 is produced from a photograph of the
interior of one of the transformer cupboards and shows the transformer
in place with the end bell of the high potential cable and the primary
switchboard containing switches and enclosed fuses. The illustration
on page 123 shows one of the secondary distributing switchboards
which are located immediately behind the ticket booths, where they are
under the control of the ticket seller.
[Illustration: TRANSFORMER COMPARTMENT IN PASSENGER STATION]
In lighting the subway between passenger stations, it is desirable, on
the one hand, to provide sufficient light for track inspection and to
permit employees passing along the subway to see their way clearly and
avoid obstructions; but, on the other hand, the lighting must not be
so brilliant as to interfere with easy sight and recognition of the
red, yellow, and green signal lamps of the block signal system. It is
necessary also that the lights for general illumination be so placed
that their rays shall not fall directly upon the eyes of approaching
motormen at the head of trains nor annoy passengers who may be reading
their papers inside the cars. The conditions imposed by these
considerations are met in the four-track sections of the subway by
placing a row of incandescent lamps between the north-bound local and
express tracks and a similar row between the southbound local and
express tracks. The lamps are carried upon brackets supported upon the
iron columns of the subway structure, successive lamps in each row
being 60 feet apart.
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