Illustration depicting an instrument panel for pneumatic signalling system at the Pittsburgh Yards, Pennsylvania Railroad. All movements were displayed electrically on the model of the track above the keyboard. Dated 19th century

---

Size: 5606px × 3741px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1890, 19th, america, american, archival, archive, century, electrical, electrically, electricity, historical, history, illustrated, illustration, instrument, keyboard, model, panel, pennsylvania, pittsburgh, pneumatic, rail, railroad, signal, signalling, system, track, train, trains, transport, transportation, yard