Growth Of American Cities. Boston was trying to grow nearly 100 years before it attained a population of 10,000. Albany was 200 years. New York was 130 years. Philadelphia, settled 60 or 70 years later, grew much faster than the older cities, and arrived at the dignity of 10,000 in about 50 years. New Orleans was about 100 years old before she attained that number. During the first hundred years after the settlement of Boston (1630), this was the largest city of the colonies. New York became as populous as Boston just before the revolutionary war ; about 1811 New York became as populous as Philadelphia, each containing 100,000 inhabitants. Baltimore overtook Boston about the year 1800. The principal new cities grew to the number of 10,000 nearly as follows :

Pittsburgh in 65 years ; Louisville, 50 years ; Cincinnati, 22 years ; Cleveland, 40 years ; Detroit, 45 years (counting out its French and Indian period); New Albany, 35 years; Chicago, 12 years ; Milwaukie, 10 years.

These cities attained to 20,000 in the num-of years from their birth as follows :

Boston, 163; Albany, 220; New York, 150 ; Philadelphia, 80 : New Orleans, 113 ; Baltimore, about 80 ; Pittsburgh, 75 ; Louisville, 41 : Cincinnati, 30 : Cleveland. 45 ; Detroit, 52 ; Chicago, 16 ; Milwaukie, 17.