A map from 1911 of North America, Central America, Greenland, and the Caribbean to Puerto Rico showing the population distribution at the time. The map is color-coded to show population densities from under 2 persons per square mile to areas of over 128 persons per square mile. A chart at the bottom of the map shows comparative city rankings based on population at the time for Montreal, Pittsburg, Toronto, San Francisco, New Orleans, Washington, and Winnipeg.