"Carte des Declinaisons et Inclinaisons de l'Aiguille Aimantee Redigee d'Apres la Table des Observations Magnetiques Faites par les Voyageurs Depuis l'Annee 1775", Buffon, Comte de
Subject: Indian Ocean
Period: 1780 (circa)
Publication: Histoire Naturelle Histoire des Mineraux
Color: Black & White
23.1 x 20.1 inches
58.7 x 51.1 cm
This chart came from a series of 8 maps published in the scarce mineralogy section of Buffon's Historie Naturelle. The variations in terrestrial magnetism at different points on the earth's surface are indicated throughout the map, especially along the southern coast of Africa and East Indies. Only the outlines of the continents are depicted along with a few place names.
Issued folding on heavy, watermarked paper with moderate offsetting.