Mason-Dixon Survey
Inscription
Here, in 1763, the southernmost point of Philadelphia was determined as the starting point for the survey of one of the most important borders in the nation. Charles Mason and Jeremiah Dixon took scientific measurements of a degree of latitude, elevating professional surveying standards. The survey ended a land dispute begun by William Penn and Lord Baltimore.
Western Pa. Indian wars and severe weather delayed completion of the line until 1768.
Location
Sources
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