Background
Fritz, John born in Chester County, Pennsylvania; chief engineer Bethlehem Iron Company 1860; introduced 3-high roller plant 1850's; one of first to apply Bessemer process to United States practice.
Fritz, John born in Chester County, Pennsylvania; chief engineer Bethlehem Iron Company 1860; introduced 3-high roller plant 1850's; one of first to apply Bessemer process to United States practice.