Complex sentence: Washington C. DePauw, a wealthy New Albany banker, was the original owner of the land, who made the bulk of his money with his American Glass Works, which by 1890 produced two thirds of the plate glass in the United States.
Split into simpler sentences: Washington C. DePauw, a wealthy New Albany banker, was the original owner of the land. He made the bulk of his money from the American Glass Works, which by 1890 produced two thirds of the plate glass in the United States.