Relief shown by hachures and spot heights; depths shown by soundings. Inset: Diagram of the middle states. Ancillary map: [North and Central America]. Includes isothermal lines. "Isothermal lines by Lorin Blodgett." Nos. 17 & 18 from Colton's...
Relief shown by hachures and spot heights; depths shown by soundings. Insets: [North America showing Alaska's location in relation to the United States] -- Diagram of the Middle States. Text on verso: "Province of Canada, no. 1. Alaska, late...