Hydrographical, Political, and Commercial Divisions of the
Union.--Systems of Public Works resulting therefrom.--Lines
extending from East to West.--Erie Canal, Pennsylvania Canal,
&c.--Communications between the St. Lawrence and Mississippi
Basins.--Ohio Canal and others.--Improvements in the Navigation of
both Rivers.--Communication along the Atlantic Coast.--Coasting
Trade.--Lines of Railroads and Steamboats.--Routes radiating from the
Capitals.--Works around Coal Mines.--Miscellaneous Works.--National
Road.--Character of the Public Works in the United Slates.--American
Engineers.--The Public Works strengthen the Union.--Necessity of the
European Governments executing similar Works. 227