Complex sentence: The Schuylkill Navigation system quickly assumed a monopoly position in the transportation of anthracite coal from the coal mines of Schuylkill County to Philadelphia, and by 1841, was annually transporting over 737,517 tons of cargo.
Split into simpler sentences: The Schuylkill Navigation system quickly assumed a monopoly position in the transportation of anthracite coal from the coal mines of Schuylkill County to Philadelphia. By 1841, the Schuylkill Navigation was annually transporting over 737,517 tons of cargo.