Charles Martin Hall memorial
Thompson Township, OH
In the years after the Civil War, American ingenuity was racing to turn laboratory chemistry into world-changing industry, and few breakthroughs matched what a young Ohioan achieved in a woodshed laboratory. Working just after his college years, Charles Martin Hall discovered an inexpensive electrolytic method to extract aluminum, a metal that had until then been rarer and costlier than silver. His process transformed aluminum from a precious curiosity into an everyday material and seeded a major American industry.