19th Street entrance.
Cornerstone from 1911 in lower center of image.
This large stationary Corliss engine, which had been in the Central Manual Training School, is now displayed in the Smithsonian's American History Museum in Washington DC.
The Corliss engine improved on prior engines, and the first version, at 40-foot tall, was displayed at the 1876 Centennial Exposition in Fairmount Park. Engines like this allowed factories to be at a remove from falling water as a source of power. Coal made steam and the steam powered multiple machines via complex linkages made via belts. Later, these engines were used to make electricity which was then transferred to individual motors at each machine.
Plaque at Smithsonian describing provenance of the engine from the Central Manual Training School, then the Franklin Institute.