$18,720,344 Canadian goods to the States, 12,182,314 $30,902,658 We here append a table showing the progress, from decade to decade, of the principal centres of population of the plain since 1820. It has been made with all the accuracy which our sources of information enable us to attain. There are in it, no doubt, many errors, but it will be found, in the main, and for general argument, substantially correct. For future reference, it will be valuable to persons who take an interest in the development of our new urban communities. Included in each city are its outlying dependencies--such as Newport and Covington with Cincinnati, and Lafayette with New Orleans. 1830. 1840. 1850. 1860. New Orleans 46,310 90,000 130,565 180,000 Cincinnati 21,831 47,000 130,739 250,000 St. Louis 5,852 16,469 82,000 180,000 Chicago 100 4,650 29,963 150,000 Pittsburg 12,568 25,000 71,595 125,000 Buffalo 8,653 18,213 42,265 100,000 Montreal 30,000 40,000 55,000 90,000 Louisville 10,341 21,210 43,194 89,000 Detroit 2,222 9,162 21,019 80,000 Milwaukee 50 1,730 20,061 75,000 Cleveland 1,047 6,071 19,377 70,000 Toronto 1,677 13,500 27,500 70,000 Rochester 9,269 20,191 36,409 50,000 Quebec 26,250 32,500 41,200 55,000 Columbus, O. 2,450 6,671 17,882 40,000 Mobile 3,194 12,672 20,515 35,000 Hamilton, C. W. 1,500 4,200 13,000 25,000 Memphis 1,500 3,500 8,839 25,000 Nashville 5,566 6,929 10,478 25,000 Dayton 2,954 6,067 10,977 25,000 Indianapolis 1,000 2,692 8,034 22,000 Wheeling, Va. 5,221 7,885 11,435 20,000 Kingston, C. W. 2,500 5,500 10,000 20,000 Lockport, N. Y. 3,800 6,500 12,323 20,000 Oswego 3,200 4,665 12,205 20,000 Toledo 30 1,229 3,829 20,000 Zanesville 3,000 6,000 12,355 20,000 est. est. New Albany 1,500 4,000 9,895 20,000 est. est. Peoria 800 2,000 5,095 20,000 est. est. Quincy, Ill. 1,000 3,000 6,902 20,000 Galena 2,000 4,000 6,004 20,000 Dubuque 200 1,500 3,108 16,000 Keokuk ... 1,000 2,478 16,000 Davenport ... 500 2,478 12,000 Burlington, Ia. ... 1,000 1,848 12,000 Columbus, Ga. 1,000 4,000 5,052 10,000 Alton, Ill. 250 2,500 3,585 10,000