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1871

Geol. Massachusetts.

State Atlas

Geological map of Massachusetts, compile …

1874

Geological Formations of the United Stat …

World Atlas

Gray's Atlas Map of the United States Sh …

1878

Geological Map of the United States.

World Atlas

Gray's Geological Map of the United Stat …

1872

Geological map of Ohio.

State Atlas

Geological map of Ohio by J.S. Newberry, …

1873

Map of Maryland and the District of Colu …

State Atlas

Map of Maryland and the District of Colu …

1872

Penn. geological formations.

State Atlas

Topographical map of Pennsylvania, color …