Scarce map of the mountains and glaciers in the area of Geneva and Mont Blanc, which appeared in Horace-Bénédict de Saussure's Voyages dans les Alpes : précédés d'un essai sur l'histoire naturelle des environs de Genève. This is an attempted definitive mapping of this Alpine region which saw high-level scientific surveying throughout the 19th and even the early 20th centuries.
The map includes a credit noting that the map is drawn from the work of Borgonio, likely a reference to Giovanni Tommaso Borgonio's monumental 25-sheet map of the Kingdom of Sardinia. However, Saussure suggests that Borgonio was incorrect in some of the locations that he used. Saussure purports to correct them here.
The main map follows the Rhone through Lake Geneva and looks southwards as far as Annecy. The inset map gives a very detailed look at the mountains around Faucigny and the Mont Blanc region. An index in the lower right gives the elevations of major mountains.
The Voyage dans les Alpes was an important text about the mountain chain published by Saussure, a professor of physics and philosophy at Geneva. He was a leading early petrologist, and the Voyage was the collation of his works on his scientific discovery of the region.