Chateau in Pittsburgh in Allegheny County, Pennsylvania — The American Northeast (Mid-Atlantic)
Langley Observatory Clock
Photographed By Mike Wintermantel, October 29, 2014
1. Langley Observatory Clock Marker
Inscription.
Langley Observatory Clock. . The title of the sculpture, Langley Observatory Clock, refers to the work of Samuel P. Langley. In 1870, Langley, director of the Allegheny Observatory, created the Allegheny System - a standardized system of measuring and disseminating accurate time. Langley used the observatory telescope and astronomical observations to set the time on a specifically designed clock. Using telegraph wires, Langley connected the observatory clock to a highly visible clock located at Pittsburgh's City Hall on Smithfield Street. By the end of the year, 42 railroads were provided a standard time through this system.
The title of the sculpture, Langley Observatory Clock, refers to the work of Samuel P. Langley. In 1870, Langley, director of the Allegheny Observatory, created the Allegheny System - a standardized system of measuring and disseminating accurate time. Langley used the observatory telescope and astronomical observations to set the time on a specifically designed clock. Using telegraph wires, Langley connected the observatory clock to a highly visible clock located at Pittsburgh's City Hall on Smithfield Street. By the end of the year, 42 railroads were provided a standard time through this system.
Location. 40° 26.706′ N, 80° 1.013′ W. Marker is in Pittsburgh, Pennsylvania, in Allegheny County. It is in Chateau. Located on the North Shore Trail between The Carnegie Science Center and Heinz Field. Touch for map. Marker is in this post office area: Pittsburgh PA 15212, United States of America. Touch for directions.
Photographed By Mike Wintermantel, October 29, 2014
2. Langley Observatory Clock Marker
Located in front of sculpture
Credits. This page was last revised on February 2, 2023. It was originally submitted on October 30, 2014, by Mike Wintermantel of Pittsburgh, Pennsylvania. This page has been viewed 908 times since then and 114 times this year. Photos:1, 2. submitted on October 30, 2014, by Mike Wintermantel of Pittsburgh, Pennsylvania.
