Démonstrations Géométriques, des Sphères Droite, Paralelle, et Oblique: Brion de la Tour c. 1770

Title: Démonstrations Géométriques, des Sphères Droite, Paralelle, et Oblique Author: Louis Brion de la Tour Date: c. 1770 Medium: Hand-colored copperplate engraving Condition: Very Good - foxing and age toning, paper loss in left margin, tide marks in lower corners Inches: 14 1/8 x 11 1/8 [Paper] Centimeters: 35.88 x 28.26 [Paper] Product ID: 102029 "Geometric Demonstrations of Straight, Parallel, and Oblique Spheres" Image depicting the axes of the earth as viewed from different perspectives. Includes a compass rose at center and a diagram of the refraction of sunlight.