Figures & data
Figure 1. “‘N_____ ’ Camp” marked in Thomas Edison’s 1926 atlas of New Village, New Jersey. (Courtesy of Thomas Edison National Historic Site.)
Figure 2. Limestone quarry on the edge of the Lehigh Valley illustrates the scale of cement manufacturing operations and its impacts on nearby residences, ca. 1920s. (Courtesy of Thomas Edison National Historic Site.)
Figure 3. Convict laborers built concrete highways in Georgia and other Southern states. W. Jess Brown, “Convict Labor on Concrete Road Construction,” Concrete Highway Magazine 2, no. 7 (July 1918): 152–53.
