Pennsylvania, 1892
A map from 1892 of Pennsylvania showing the capital at Harrisburg, counties and county seats, principal cities and towns, railroads, shoreline on Lake Erie, and rivers....

Pennsylvania, 1902
A map from 1902 of Pennsylvania showing the capital, Harrisburg, principal cities and towns, railroads, mountains, and rivers....

Plan of Pittsburgh, 1903
A plan of Pittsburgh from 1903 showing principal streets, railroads and stations, bridges, and landmarks. "Pittsburgh, the second largest city of Pennsylvania, and the leading iron, steel, and glass manufacturing center of the United States, lie...

Pennsylvania, 1906
A map from 1906 of Pennsylvania showing the capital, Harrisburg, principal cities and towns, railroads, mountains, shoreline on Lake Erie, and rivers....

Pennsylvania, 1909
A map from 1909 of Pennsylvania showing the capital at Harrisburg, principal cities and towns, railroads, mountains, shoreline on Lake Erie, and rivers....

Preglacial Drainage of Western Pennsylvania, 1911
A map from 1911 showing the probable preglacial drainage of western Pennsylvania. The limit of glaciation is shown by the broken crossed line....

Tertiary Peneplain of the Central Appalachians, 1911
A map from 1911 showing the warped surface of the early Tertiary (Harrisburg) peneplain of the central Appalachians. ...

Past and Present Courses of Monongahela and Youghiogheny Rivers, 1911
A map from 1911 showing the present and pre–Pleistocene courses of Monongahela (left) and Youghiogheny rivers. ...

Philadelphia, 1911
A map from 1911 of Philadelphia and vicinity showing the Delaware River, principal roads, neighboring cities and towns, railroads and stations, and major landmarks....

The Carnegie Institute, 1911
A layout of the Carnegie Institute in Pittsburg, Pennsylvania....