United States, northern border 1878

Index map title: Index map, Joint Series. Shows the United States and Canadian border from the summit of the Rocky Mountains to the northwest angle of the Lake of the Woods. Relief shown by hachures and spot heights. Title from second sheet. First sheet contains index map at a scale of 1:1,013,760. Accompanies the U.S. Northern Boundary Commission's "Reports upon the survey of the boundary between the territory of the United States and the possessions of Great Britain" ... (44th Congress, 2d session, 1876-1877. Senate. Ex. doc. 41, Washington D.C., 1878)Grayscale;1:126,720. 1 in. = 2 mile