Cartographic Details: Scale 1:792,000. 1 in. to 12 1/2 mi. (W 110⁰00ʹ--W 102⁰00ʹ/N 55⁰30ʹ--N 49⁰00ʹ). Relief shown by spot heights. Corrected to July 1, 1918. Base map from plates of Geographer's Branch, Dept. of the Interior. 16th ed. 1 map : color, mounted on cloth backing ; 93 x 80 cm Scale 1:792,000. 1 inch to 12 1/2 miles General Map Collection