Topics Landscape Changes

Map Lovers’ Monday: Philadelphia Topography

Birkinbine Schuylkill Hydrographical Survey 1861-66

Two reports on the state of the Schuylkill River, 1867

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

Duplex Pumping Engine, Belmont Works

Duplex Pumping Engine, Belmont Works