were made here in pittsburgh during the civil war, including an 80 ton behemoth designed by thomas jackson robin. it was 20 inch caliber. 4.5hrough a 20 inch ball miles when loaded on top of 200 pounds of mammoth gunpowder. a special kind of powder that he invented. pittsburgh was the arsenal of the union. it was going 24/7. women and girls rolled cartridges at allegheny arsenal. they turned out thousands and thousands of them every day using a machine that was invented by thomas jackson rodman that could turn out these mini balls, lead bullets uniformly and by the thousands. on september 17, 1862, a tragedy struck. a spark ignited the gunpowder that those women workers were using. it blew up the allegheny arsenal. three blasts rocked the city. windows were broken for blocks around and 78 women and girls perished in the flames. it was the worst industrial accident of the civil war. after the war the energy industry grew up as the steel industry group. people used the natural gas here in pittsburgh to fuel industry. they used the soft coal that was natural here. they burned it and made coke out o

were made here in pittsburgh during the civil war, including an 80 ton behemoth designed by thomas jackson robin. it was 20 inch caliber. it through a 20 inch ball 4.5 miles when loaded on top of 200 pounds of mammoth gunpowder. a special kind of powder that he invented. pittsburgh was the arsenal of the union. it was going 24/7. women and girls rolled cartridges at allegheny arsenal. they turned out thousands and thousands of them every day using a machine that was invented by thomas jackson rodman that could turn out these mini balls, lead bullets uniformly and by the thousands. on september 17, 1862, a tragedy struck. a spark ignited the gunpowder that those women workers were using. it blew up the allegheny arsenal. three blasts rocked the city. windows were broken for blocks around and 78 women and girls perished in the flames. it was the worst industrial accident of the civil war. after the war the energy industry grew up as the steel industry group. people used the natural gas here in pittsburgh to fuel industry. they used the soft coal that was natural here. they burned it and made coke