(Paris, L'Imprimerie Royale, 1735). 4to. Without wrappers. Extracted from ""Mémoires de l'Academie des Sciences. Année 1733"". Pp. 117-140 and 4 folded engraved plates. Fine and clean.
By this paper Camus was the first to work out the mathematical theory of gearteeth into a systematical and general theory of the mechanism.