

Figure 19. — Pumping engine of Philadelphia Water Works, 

 about 1 80 1. This engine, built by Nicholas Roosevelt and 

 located in a pumphouse on the Schuylkill River at Chestnut 

 Street, pumped water to the Center Square Works where a 

 similar engine pumped it into a small reservoir above the 

 engine. Original wash drawing in the Frederick Graff Collec- 

 tion. Photo courtesy of The Franklin Institute Library. 



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