Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Jennerstown Relay was a part of the Western Union Telegraph Company's first commercial microwave telecommunications network known as the New York-Washington-Pittsburgh Radio Relay Triangle. More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: The Chesapeake & Potomac Telephone Company Warehouse is significant for its role in the development and maintenance of Washington, DC's telephone network by the Chesapeake & Potomac (C&P) Telephon More
Significance: This building, which served as Bell Telephone of Pennsylvania's switching hall, may be on the oldest telecommunications facilities still in use in the country. It is an excellent example of the Ro More
Significance: This building, which served as Bell Telephone of Pennsylvania's switching hall, may be on the oldest telecommunications facilities still in use in the country. It is an excellent example of the Ro More
Significance: World War I strained the facilities in the concrete buildings constructed during the 1910-14 building campaign. The Finance and Signal Building is a surviving example of wood construction used to More
Significance: World War I strained the facilities in the concrete buildings constructed during the 1910-14 building campaign. The Finance and Signal Building is a surviving example of wood construction used to More
Significance: World War I strained the facilities in the concrete buildings constructed during the 1910-14 building campaign. The Finance and Signal Building is a surviving example of wood construction used to More
Significance: World War I strained the facilities in the concrete buildings constructed during the 1910-14 building campaign. The Finance and Signal Building is a surviving example of wood construction used to More