Lake Superior and Michigan, 1911
Part of the Great Lakes region. The heavy broken line is the boundary between the Superior Highlands on the north and the Prairie Plains on the south. It is, however, more prominent as a geologic boundary than as a topographic boundary. Note the c...

Central States, 1911
The Central States in the early twentieth century....

Red River Basin, 1916
The area around Fargo and Moorhead, part of the Red River basin. ...

Kansas City and Vicinity, 1922
Kansas City, in both Kansas and Missouri, and neighboring counties....

Drainage History of the Southern Great Lake District, Ice Age
A map from 1911 showing the early drainage history of the southern Great Lake district during the last glacial period, indicating the present lake shorelines (dashed line) and the position of glacial lakes before lakes were formed, including the earl...

Drainage History of the Southern Great Lake District, Ice Age
A map from 1911 showing the early drainage history of the southern Great Lake district during the last glacial period, indicating the present lake shorelines (dashed line) and the position of glacial lakes, including the early Lake Chicago and Lake M...

Drainage History of the Southern Great Lake District, Ice Age
A map from 1911 showing the early drainage history of the southern Great Lake district during the last glacial period. The map indicates the present lake shorelines (dashed line) and shows the retreat of the ice lobes and the expansion of the proglac...

Drainage History of the Southern Great Lake District, Ice Age
A map from 1911 showing the early drainage history of the southern Great Lake district during the last glacial period. The map indicates the present lake shorelines (dashed line) and shows the progression of the retreat of the ice lobes and the expan...

Drainage History of the Southern Great Lake District, Ice Age
A map from 1911 showing the early drainage history of the southern Great Lake district during the last glacial period. The map indicates the present lake shorelines (dashed line) and shows the progression of the retreat of the ice lobes and the expan...

Drainage History of the Southern Great Lake District, Ice Age
A map from 1911 showing the early drainage history of the southern Great Lake district during the last glacial period. The map indicates the present lake shorelines (dashed line) and shows retreat of ice from the Mohawk valley and discharge of progla...