Abstract :
This paper deals with the development of steam engines and motors for power applications at the site in Bethlehem, Pennsylvania. The longevity of some installations of steam engine drives was due to the cost of replacing engines with electric motors. As use of electrically driven mills began to gain acceptance during the early 1900s, manufacturers of steam engines for rolling mills began, understandably, to make significant improvements in such engines. Thus, their use was perpetuated as new engine installations were made, even after electric drives became common
