Journal du Voyage fait par Ordre du Roi a l'Equateur, Servant d'Introduction Historique à la Mésure des Trois Premiers Degrés du Méridien.

Without the supplement, issued in the following year. The Academie de France desptached two scientific expeditions in 1735, one to the Arctic and one to the Equator, in order to take measurements which would enable a more exact calculation of the earth’s circumference. La Condamine travelled to South America with fellow scientists Bouger and Godin, using Quito as their base, since it sits on the Equator. With the information gathered in Equador and in the Arctic, the savants were able to establish that the earth was flatter at the Poles. Borba I, p447; Rodrigues, 702; Sabin 38490.