Nation: 1793. 1851. Population 3,939,325 24,267,488 Imports £6,739,130 £38,723,545 Exports £5,675,869 £32,367,000 Tonnage 520,704 3,535,451 Lighthouses, beacons, and lightships 7 373 Cost of | £ | Miles. | £ | £ | £ Eastern States, | | |Number of engines. | | | | | | | | Hampshire, Vermont, | | | |Depth of paddles. | | |of | | Louisiana, Texas, | | | |revolutions. | | | | | |Diameter of cylinder. | | | | | |cylinder. .