This essay was reprinted in a later edition of Condorcet's Esquisse d'un tableau historique des progrès de l'esprit humain (Paris: Masson et Fils, 1822 [1795]), 407-12 (see the web link). It can also be found in his Oeuvres complètes, tome XVI (Brunswick & Paris: Vieweg, Heinrichs, Fuchs, Koenig, Levrault, Schoell & Co, 1804), 147-54.