Lot of 2 schematic drawings, each 7.75 x 12.625, executed on blue paper, featuring head-on views and cross-section diagrams of torpedo fuses with elements labelled and defined in key. Marked up and signed illegibly, though signatory's title appears to include senior engineer ("S. Egr"). The first, titled, "Capt. Lee's chemical Torpedo Fuze for Torpedoes / on Torpedo boats," with labelled diagram elements including "Leadplug," "needle to support the / small glass vial when / receiving the blow," "brass sockets," "poles to fasten the / socket to the torpedo," and others. The second, titled, "Capt. Lee's sensitive Torpedo Fuze / used on Torpedo boats," with labelled diagram elements including, "sensitiv fuze," "brass plug screwed into / the fuze from below," "vacant space filed with powder," "brass socket," and others. The Confederate States Navy used contact fuzes of various shapes and designs in the torpedoes they launched at Union ships. Chemical fuzes, as depicted in the first drawing, were designed with a glass vial containing sulfuric acid. When the glass vial was broken, the acid would make contact with a chlorate of potash and sugar contained in a vacant space around the glass vial, thus producing an explosive gas and causing the sugar to ignite. The Torpedo Bureau, under the umbrella of the Confederate Secret Service, was authorized on October 31, 1862, and headed up by Brigadier General Gabriel Rains. It was by him and/or at his direction that many of these devices were invented and manufactured for the CSN.