Main line, piping and wiring for block and interlocking system, showing junction box on column.
Summary
Tags
subways
new york state
new york
railroad facilities
illustrations
rare book division
interborough rapid transit the new york subway its construction and equipment
main line
junction box
ultra high resolution
high resolution
interborough rapid transit company author
main
line
block
system
junction
box
column
interborough rapid transit
new york subway
subway
new york city
new york public library
Date
1904
Contributors
Interborough Rapid Transit Company, Author
Location
New York
Source
New York Public Library
Link
Copyright info
Creative Commons CC0 1.0 Universal Public Domain Dedication ("CCO 1.0 Dedication")