Complex sentence: Semi-centennial Memoir of the Harlan & Hollingsworth Company, he built a foundry at 8th and Orange Streets and there installed the state's first stationary steam engine.
Split into simpler sentences: Semi-centennial Memoir of the Harlan & Hollingsworth Company, he built a foundry at 8th and Orange Streets. In this foundry, he installed the state's first stationary steam engine.