Subjects Natural Environment

Thomas Mill Covered Bridge on the Wissahickon

Thomas Mill Covered Bridge over Wissahickon Creek (Picturesque America)

Black-and-white reproduction of the title page of an old periodical

Images from “A Day in the Ma’sh” by Maurice F. Egan, Scribner’s Monthly, July 1881

Black-and-white image of workers in a pit with a sewer opening behind them and text

Frankford Creek: Sad History of an Urban Stream title page

Birkinbine Schuylkill Hydrographical Survey 1861-66

Schuylkill River Hydrographical Survey 1861-66 by H. P. M. Birkinbine

Lemon Hill and Sedgley Park, Graff Jr., 1851 (Graff05.21)

Plan of Lemon Hill and Sedgley Park, Fairmount and Adjoining Property, 1851