Middle Atlantic States, 1906
The Middle Atlantic States, showing physical features. Includes an insert of Long Island....

The Middle Atlantic States, 1909
The Middle Atlantic states. ...

Chesapeake Bay, 1911
A base map from 1911 of the Chesapeake Bay and Delaware Bay, including the principal bays tributary to them. The map shows the coastal features of Cape May, Cape Henlopen, Cape Charles, and Cape Henry, and the 10 and 20 fathom contour lines....

Southern Division of the Older Appalachians, 1911
A contour map from 1911 of the southern division of the Older Appalachian mountain system, showing the Blue Ridge, Catoctin Mountain and Bull Run Mountain in Virginia. The blank areas on the map represent Tertiary peneplain, and the shaded areas repr...

Triassic Formation of the Atlantic Slope, 1911
A map from 1911 of the Atlantic slope from the Minas Basin in the Bay of Fundy to the northern boundary of South Carolina showing the Triassic age formation known as the Newark formation of rocks, principally sandstones, shales, and conglomerates. Th...

Triassic Formations in the Older Appalachians, 1911
A map from 1911 of the Older Appalachian mountain system in Pennsylvania, New Jersey, and Virginia, showing the four Triassic Age crystalline prongs of the Older Appalachians which enclose the New York–Virginia area of Newark rocks. The map sho...