The 1931 Histomap
Géo-Politique - le 28 Avril 2015 par Mathieu WEBER

This “Histomap,” created by John B. Sparks, was first printed by Rand McNally in 1931. (The David Rumsey Map Collection hosts a fully zoomable version here.)
This “Histomap,” created by John B. Sparks, was first printed by Rand McNally in 1931. (The David Rumsey Map Collection hosts a fully zoomable version here.)