"Here you will find one of the greatest historical atlases: Charles O. Paullin and John K. Wright's Atlas of the Historical Geography of the United States, first published in 1932. This digital edition reproduces all of the atlas's nearly 700 maps. Many of these beautiful maps are enhanced here in ways impossible in print, animated to show change over time or made clickable to view the underlying data—remarkable maps produced eight decades ago with the functionality of the twenty-first century."
This old atlas provides new functionality due to technology! Maps have been georectified, many are animated allowing you to see a progression over time, many are clickable providing access to data such as population demographics or crop production, and much more. Have fun exploring.