Traité de géographie mathématique
Le Nouveau Bois (Near Montsec) Author  4to (25.5 x 21.0 cm). Contemporary green morocco; elaborate gilt panels on spine with title and author in separate plane panels; triple gilt dentelles on covers; wear to ends of spine, hinges, edges and corners with some loss. Collation: -155 (i.e. 154) pp. + 11 plates and 2 tables. The text and plates are in very good condition. Text is written in fine scrip and calligraphic hand confined for the most part within rectangular lined area. There are occasions when the text exceeds the boundary, which was prepared before any writing was done. This is confirmed by the presence at rear of a number of leaves with ink borders present without text.The organization of the text by Miss Roelant is in two parts. The first one starts with instruction in basic geometry and terms, particularly relating to spheres. This is complemented by discussion of Geography and Cosmography. There is evidence that another leaf was removed between the two leaves for Geography and Cosmolography. Apparently the author was not pleased with the text written there. The celestial theories of Ptolemy, Copernicus and Tycho Brahe are presented along with extensive treatment of the Copernican system. The Sphere as representation of the sky and earth is discussed along with observations made on the sky. For the Earth there the terrestrial and celestial globes are used about which discussion is presented on signs of the Zodiac, longitude and latitude, climates, Zodiac seasons, atmosphere, precision of the equinoxes and changing ocean tides. The second part is practical with instruction on use of the sphere and terrestrial globe (from p. 91), finding resolutions to problems and finding latitudes and longitudes in place on the globe. This is complemented by exercises in finding the duration day and night at any given time of year, calculation of the time difference, finding the time of twilight. This is a most interesting and informative manuscript written by an unknown woman scientist in early 19th century France. The original text is not only written in a beautiful script but the calligraphic writing for plates with detail drawings greatly complement this unpublished treatise. Very good Green Morocco (Item ID: 0000692)
This is a most interesting and informative manuscript written by an unknown woman scientist in early 19th century France. The original text is not only written in a beautiful script but the calligraphic writing for plates with detail drawings greatly complement this unpublished treatise.