Shipping--Pennsylvania--Philadelphia Commerce--19th Century 2 Port of Philadelphia 2 Commerce--Philadelphia--19th century 1 Pennsylvania--Economic conditions--19th century 1 Philadelphia (Pa.)--Commerce 1 Philadelphia (Pa.)--Commerce--History--19th century 1 more ... Trade Regulations--19th century 1 Trade and professional associations--Philadelphia (Pa.)--19th century 1 Trade and professional associations--Philadelphia (Pa.)--20th century 1 Trade--Pennsylvania--19th century 1 less ...