(W 125⁰--W 62⁰/N 47⁰--N 25⁰)., (E 074⁰--E 98⁰/N 36⁰--N 6⁰)., (W 011⁰--W 2⁰/N 59⁰--N 50⁰).
At top right corner of map: "Plate II, Annals of the Association of American Geographers, Volume VII."
Accompanies "Some Considerations on the Geographical Provinces of the United States" by Mark Jefferson in Annals of the Associaton of American Geographers, v. 7.