8vo, [19 x 12], 30 pp., 1 folding plate [19 x 28]. Marbled papers over boards. A8-B6 the final leaf blank and wanting. Minor even toning, excellent. Reinforcement in gutter margin of title; publisher’s ms correction on p. 7;  On the last printed page there is a note that the inventor Zacharie has signed the t-p to to distinguish it counterfeits.