- 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.
Background on Creator
Louis Brion de la Tour (circa 1743–1803) was a prominent 18th-century French geographer and demographer who held the official title of “Ingénieur Géographe du Roi,” or King’s Engineer Geographer. Although little is known about his early life, Brion de la Tour gained recognition for his prolific output of maps and atlases—his most notable work being the “Atlas Général,” published in collaboration with Louis Charles Desnos. Much of his career was devoted to scientific cartography, and he was active in Paris, where he published detailed geographical works covering Europe, the Americas, and beyond, significantly contributing to Enlightenment-era advancements in both geography and demography.