a. There is a smaller population to the square mile than in many European countries, for
1'. In 1890 the Netherlands had the average of three hundred and fifty-nine inhabitants to the square mile
2'. Great Britain had the average of three hundred and eleven.
3'. Germany had two hundred and thirty-four.
4'. France had one hundred and eighty-seven.
5'. In about one-third of the whole area of the United
States, the average is less than six.
6'. In certain more thickly settled portions the average
is from seven to forty-five.
7'. In New York, Pennsylvania, Michigan, Ohio, and
Indiana, the average is from forty-five to ninety.
8'. In a small territory made up of parts of Massachusetts, Pennsylvania, and New Jersey, the average is over ninety.
9'. In the United States as a whole, the average is twenty.