Langley Observatory Clock

Langley Observatory Clock (HM1HK6)

Location: Pittsburgh, PA 15212 Allegheny County
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Country: United States of America
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N 40° 26.706', W 80° 1.013'

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Inscription
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.
Details
HM NumberHM1HK6
Tags
Marker ConditionNo reports yet
Date Added Thursday, October 30th, 2014 at 9:01pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)17T E 583371 N 4477624
Decimal Degrees40.44510000, -80.01688333
Degrees and Decimal MinutesN 40° 26.706', W 80° 1.013'
Degrees, Minutes and Seconds40° 26' 42.36" N, 80° 1' 0.78" W
Driving DirectionsGoogle Maps
Area Code(s)412
Closest Postal AddressAt or near 481 Three Rivers Heritage Trail System, Pittsburgh PA 15212, US
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