First edition. 4to. Contemporary marbled paper wrappers, with ms. label on upper cover. Wrappers dusty, some folding and general wear to the margins of the interior pages. [iv], viii, 52pp. Paris, Durand & Pissot, 1752.
Rare. The first part of the supplement only, in which La Condamine responds to some objections to his 1751 text. The second part specifically answers the objections of Pierre Bouguer (1698-1758), who joined La Condamine on the scientific mission to Peru.
