Scarce Leonard von Euler example of Joseph Nicholas De L'Isle's map of the Russian Discoveries in the North Pacific and along the coastline of North America.
The map highlights the Russian Discoveries along the Northwest Coast of America in 1723, 1732 and 1741, the tracks of Bering's first and second voyages and of De L'Isle de la Croyere with Capt Tchirkow in 1741, the track of de Frondat's voyage of 1709 and the route of the galleons in 1743. The discovery of Water of Wager in 1746 and 1747 is also show.
The Northwest Coast of America is fictitious above Cap Blanc. The massive Sea of the West shown on Von Euler's map is one if the earliest appearances of this mythical sea on a map. The map was first published by the Prussian Academy of Science & Literature.
This example appeared in Swiss mathematician Joseph Von Euler's Atlas.