Statistics for occurrence #1 of “Thomas Jefferson Rodman” in chapter 8 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 5: Forts and Artillery.:

...eighed 117,000 pounds. On March 30, 1861, a 15-inch Columbiad was heralded in as the biggest gun in the world, but three years later this was exceeded. In 1844 Lieutenant (later Brigadier-General) Thomas Jefferson Rodman of the Ordnance Department commenced a series of tests to find a way to obviate the injurious strains set up in the metal, by cooling a large casting from the exterior. He finally developed his the...

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Thomas Jefferson Rodman 31 17 1 1 0 user votes

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