the people of the country are massed in cities of 100,000 inhabitants
and over. In the three largest cities alone--New York, Chicago, and
Philadelphia--there are almost one-tenth the population of the whole
country. There were five cities with populations between 500,000 and
1,000,000; eleven between 250,000 and 500,000; 31 between 100,000 and
250,000; 59 between 50,000 and 100,000; 120 between 25,000 and 50,000;
374 between 10,000 and 20,000; 629 between 5,000 and 10,000, and 1,173
between 2,500 and 5,000.
The thirteenth census revealed but slight change in the location of the
centre of population. In computing its position, no account of the