Album of photographs documenting the Philadelphia, Middle, and Pittsburgh divisions of the Pennsylvania Railroad, incorporated in 1846. The consolidated company sought to build a trunk route from Philadelphia to Pittsburgh through the Allegheny mountains in order to compete with the Erie Canal for freight traffic. In 1854, rail passage through the Alleghenies via the "Horse Shoe Curve" was achieved and spurred the establishment and growth of the several towns depicted along the route.
Album of photographs of aerial and landscape views taken in the park during the Centennial Exhibition of 1876, which celebrated the centennial of the United States through an international exhibition of industry, agriculture, and art. Photographs predominately depict views from observation towers at George's Hill and Lemon Hill.
