Embracing Descriptions, Discussions, and Professional Opinions Concerning the Material, Fabrication, Requirements, Capabilities, and Endurance of European and American Guns for Naval, Sea-coast, and Iron-clad Warfare, and Their Rifling, Projectiles and Breech-loading. Also, Results of Experiments Against Armor, from Official Records. With an Appendix, Referring to Gun-cotton, Hooped Guns, Etc., Etc