Claude Jacques TOUSSAINT, Traité de géométrie et d'architecture théorique et pratique, simplifiéParis, l'auteur, 1811-1812 2 parts in-4° and one additional delivery for the theoretical part; 2 parts in-4° and one additional delivery for the practical part; in their original covers (300 X 235 mm [text] and 305 X 260 mm [plates]): [theoretical part] 15-24-134-7p., 1f. errata, 69pl. double num. 1-16, 1-23, 1-7, 1-2, 1, 1-17, 1-3 and the 1st extra delivery containing the first 15 uncut pages under printed blue cover; [3] f. including title, 82p. num. 11-92, [1] f. false-title (cardboard), 105p. (a pastedown under text page 105 "end of second volume), -[1], 4p. (table), 6 p. (list of subscribers), 41 double plates and the 1st issue in addition containing the first 8 leaves under printed blue cover (110 double plates in all). Stapled volumes as issued, in white paper covers, boards mounted on tabs. Full margins and very fresh. Titlepieces replaced. Two additional issues containing extensive information. In modern, laced gray cloth dust jackets. A rare publication which, despite its title, is anything but simplified.