Subjects Technology

Bird's eye color view of reservoirs, green areas of foliage, pink roads and blue water, with a dam prominent

Fairmount and vicinity, 1839

Centre Square Engine House, location of one of two steam engines used in the city’s original water system. Engraving by Birch.

Centre Square Engine House, ca. 1807

Bethlehem Water Works, 2011

Duplex Pumping Engine, Belmont Works

Duplex Pumping Engine, Belmont Works

DeLaval Beauty Shots 6

Electric Pump Installations at Lardner’s Point Pumping Station

The Pennypack Sewage Treatment Works in 1914

Pennypack Sewage Treatment Works, 1914