Answer:
What replaces steam? What new power source was developed in the late 1800s? In the late 1800s, a new power source—electricity—replaced steam as the dominant source of industrial power.
The Constitution enumerates certain powers which are reserved to the federal goverment and other powers which are delegated to the state.
Those powers which are not explicitly related in the document to any of the goverment levels will automatically be reserved to and exercised by the supreme federal goverment.
Many indentured servants chose to move to Pennsylvania would be my guess. I can't be completely sure.