L'Ingenieur de campagne: or, Field engineer [electronic resource] : Written in French by the Chevalier de Clairac, and translated by Major Lewis Nicola. To which is added, by way of appendix, a short treatise on sea batteries, shewing their defects, and an attempt to remedy them. Likewise, an explanation of all the technical terms used in the work. By the translator. Illustrated with a variety of copper-plates.