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Document Max. Freq Min. Freq
Harper's Encyclopedia of United States History (ed. Benson Lossing) 192 192 Browse Search
George P. Rowell and Company's American Newspaper Directory, containing accurate lists of all the newspapers and periodicals published in the United States and territories, and the dominion of Canada, and British Colonies of North America., together with a description of the towns and cities in which they are published. (ed. George P. Rowell and company) 88 88 Browse Search
Knight's Mechanical Encyclopedia (ed. Knight) 41 41 Browse Search
Edward L. Pierce, Memoir and letters of Charles Sumner: volume 2 32 32 Browse Search
Hon. J. L. M. Curry , LL.D., William Robertson Garrett , A. M. , Ph.D., Confederate Military History, a library of Confederate States Military History: Volume 1.1, Legal Justification of the South in secession, The South as a factor in the territorial expansion of the United States (ed. Clement Anselm Evans) 31 31 Browse Search
Cambridge History of American Literature: volume 3 (ed. Trent, William Peterfield, 1862-1939., Erskine, John, 1879-1951., Sherman, Stuart Pratt, 1881-1926., Van Doren, Carl, 1885-1950.) 26 26 Browse Search
Lucius R. Paige, History of Cambridge, Massachusetts, 1630-1877, with a genealogical register 25 25 Browse Search
Francis Jackson Garrison, William Lloyd Garrison, 1805-1879; the story of his life told by his children: volume 3 23 23 Browse Search
Brigadier-General Ellison Capers, Confederate Military History, a library of Confederate States Military History: Volume 5, South Carolina (ed. Clement Anselm Evans) 21 21 Browse Search
Benjamin Cutter, William R. Cutter, History of the town of Arlington, Massachusetts, ormerly the second precinct in Cambridge, or District of Menotomy, afterward the town of West Cambridge. 1635-1879 with a genealogical register of the inhabitants of the precinct. 19 19 Browse Search
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Browsing named entities in 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. (ed. Francis Trevelyan Miller). You can also browse the collection for 1844 AD or search for 1844 AD in all documents.

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. The development of rifled cannon was in an experimental stage when the war opened. There had been a decided movement toward the adoption of these guns in 1859, simultaneously The biggest gun of all — the 20-inch monster for which no target would serve A photograph of the only 20-inch gun made during the war. It weighed 117,000 pounds. On March 30, 1861, a 15-inch Columbiad was heralded in Harper's Weekly 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 theory of casting a gun with the core hollow and then cooling it by a stream of water or cold air through it. So successful was this method that the War Department, in 1860, authorized a 15-inch smoothbore gun. It proved a great success. Ge