Yes, Pennsylvania did rely on slave labor during the colonial period and into the early years of the United States. However, the practice was gradually abolished beginning in the late 18th century, culminating in a state law in 1780 that began the process of gradual abolition. By the early 19th century, slavery had largely disappeared in Pennsylvania.
Pennsylvania was a"Free State"
free state
Pennsylvania was a free state. The Quaker influence made Pennsylvania one of the first bastions of the anti-slavery movement.
Maryland (slave) and Pennsylvania (free soil)
Should this question be referring to the United States before slavery was abolished in 1865, here are a few slave holding States that bordered on States were slavery was illegal: Slave State Maryland: borders with non slave States of: Pennsylvania and West Virginia; Slave State of Delaware bordering non slave States of New Jersey and Pennsylvania. This is only a short list of slave States bordering non slave States at the time of the US Civil War.
On 12 December 1787 Pennsylvania joined the US as it's second state.
Mason and Dixon surveyed the border between Maryland and Penn's domain of Pennsylvania and Delaware State. This tour follows the southern border of Pennsylvania covered bridges in Pennsylvania, Delaware and Maryland. This is a tour of covered bridges, not of the Mason-Dixon line
It was the border between Pennsylvania (free soil) and Maryland (slave-state). Beyond that, it had no actual significance.
Maryland (slave) and Pennsylvania (free).Pennsylvania and Maryland
Slave state
Philadelphia is in the state of Pennsylvania which is in the country of U.S.A.