Entretiens sur la cause de l'inclinaison des orbites des planetes [...].

4to: [4]-140 pp.; 2 pl. (wormholes throughout without loss of text, browning).

Contemp. mottled calf, gilt-orn. spine with raised bands, red edges (corners and sides def., wormholes).

Rare second ed. (1st 1734) by the French mathematician, geophysicist, geodesist and astronomer Bouguer (1698-1758). Ill. with 2 fold. engr. pl. Bouguer was the inventor of the heliometer, which is used to measure the diameter and distances of the celestial bodies. He is also the creator of the photometry, the part of physics that teaches to measure the intensity of light.
Ref. BnF. - Not in Houzeau & Lancaster.