DENSITY. There were in 1909 25.6 persons to the square mile in the United States, as against about 600 persons in England, 270 persons in Germany, and about 53 persons in European The North Atlantic and the North Central States contain the great majority of the urban population. In 1900 the North Atlantic States had 16 and the North Central States 14 of the 38 cities having over 100,000 inhabitants each, while the former division had 54 and the latter 35 of the 122 cities with a population between 25,000 and 100,000.
Russia. The average density of population in the United States is greatly reduced because of the vast uninhabited areas in the west ern half of its territory. In some sections, such as Massachusetts or New Jersey. the den sity compares favorably with that of Western European countries, as shown in the following table: - SEX. The population contrasts with that of most European countries in that the males out number the females. The excess is greatly in
creased because of the greater number of male than of female immigrants.
In the North Atlantic and the South Atlantic States the sexes arc almost equal iu number. In some of these States, such as Massachusetts, the females are much in excess of the males, amount ing in the State named to 51.3 per cent. of the total population. This is in part due to the large immigration of girls for work in the fac tories of that State, and in part to the emigra tion of men to the West. There is no State in the other divisions of States in which the females are equal in number to the males, and in the three States Montana, Wyoming, and Nevada the females are less than 40 per cent, of the total, while in Alaska they constitute only 27.9 per cent. of the total population. The following table shows the proportion of the sexes by nativ ity and coly in 1900: