Relief shown pictorially, and with form lines on coasts. "P.I. no. 53 lllme." Shows routes of Captains Bering and "Tschirikow" through Siberia and across the North Pacific to North America, including Alaska, with revisions of the NW coast of America (on earlier eds., Alaskan coast was overextended by 30⁰), and of the Aleutian Islands; interior of North America vague. Attributed to G.F. Miller. This ed. includes revisions of the NW coast of America, and of the Aleutian Islands. Prime meridian from ed. published London : Robt. Sayer, 1775: Ferro. Coordinates on map: E90⁰--W320⁰/N80⁰--N40⁰.