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- Aeronautical Beacon in the Alleghenies, circa 1925 - In 1924, with the success of experimental night operations and increasing business interest in next-day mail, the U.S. Air Mail Service announced plans to establish regular overnight flights between New York and Chicago. Preparations included mounting floodlights and searchlights at airfields and constructing a series of routing beacons and emergency landing fields along the route. The first official flights departed from both terminal cities on July 1, 1925.
- circa 1925
- Collections - Artifact
Aeronautical Beacon in the Alleghenies, circa 1925
In 1924, with the success of experimental night operations and increasing business interest in next-day mail, the U.S. Air Mail Service announced plans to establish regular overnight flights between New York and Chicago. Preparations included mounting floodlights and searchlights at airfields and constructing a series of routing beacons and emergency landing fields along the route. The first official flights departed from both terminal cities on July 1, 1925.
- "America's Super Highway," A Tunnel on the Pennsylvania Turnpike, 1940 - When it opened in 1940, the Pennsylvania Turnpike ran 160 miles between Harrisburg and Pittsburgh. It was extended another 100 miles east to Philadelphia in 1950. The turnpike included seven tunnels through the Allegheny Mountains. Six of those tunnels originally were started in the 1880s for the never-finished South Pennsylvania Railroad.
- 1939-1940
- Collections - Artifact
"America's Super Highway," A Tunnel on the Pennsylvania Turnpike, 1940
When it opened in 1940, the Pennsylvania Turnpike ran 160 miles between Harrisburg and Pittsburgh. It was extended another 100 miles east to Philadelphia in 1950. The turnpike included seven tunnels through the Allegheny Mountains. Six of those tunnels originally were started in the 1880s for the never-finished South Pennsylvania Railroad.