Paris: Mallet-Bachelier, 1862. paperback. 2 vols., original printed wrappers; spines mostly lacking. Paris: Mallet-Bachelier, 1862-1864. Good. good.
First editions of the expansion of his earlier work of 1822. Poncelet was a mathematician and engineer who did much to revive the concept of projective geometry. He conceived & drafted this work while a prisoner of war in Russia. Despite the disbound condition, the volumes are internally clean, with a minimum of foxing.