Bethlehem, PA, United States
John Fritz. The famed mechanical engineer was superintendent of Johnstown's Cambria Iron Works, 1854-60, & Bethlehem Iron Company, 1860-92. Pioneered in production of rails and armor plate. A Lehigh trustee, he endowed the engineering laboratory here.
Listen to the audio guide for Blue plaque № 29349 Free on WIP — starts by itself when you arrive, even with the screen off