At the time of filming in 1974, this plant had been manufacturing steel nonstop for 102 years using the Bessemer process. [Sir Henry Bessemer]’s method for turning pig iron into steel was a ...

At the time of filming in 1974, this plant had been manufacturing steel nonstop for 102 years using the Bessemer process. [Sir Henry Bessemer]’s method for turning pig iron into steel was a ...

At the turn of the 20th century, advancements in steel production, such as the Bessemer process, positioned Pennsylvania as a leader in the industry. This innovation enabled the mass production of ...