. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. Fig. 1. ANCIENT AND MODERN OUTLINES OF LAKE ERIE. The broken lines show the positions of the shores at two epochs of the lake's history. point opposite the present city of Erie, and it was but one-sixth as large as the modern lake. Since that time the land has gradually risen at the north, canting the basin toward the south, and the lake has gradually encroached upon the lowlands of its valley. At a date to. Toronto Fig. 2. ANCIENT AND MODE
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. Fig. 1. ANCIENT AND MODERN OUTLINES OF LAKE ERIE. The broken lines show the positions of the shores at two epochs of the lake's history. point opposite the present city of Erie, and it was but one-sixth as large as the modern lake. Since that time the land has gradually risen at the north, canting the basin toward the south, and the lake has gradually encroached upon the lowlands of its valley. At a date to. Toronto Fig. 2. ANCIENT AND MODERN OUTLINES OF LAKE ONTARIO. The broken line shows the original extent of the lake. be presently mentioned as the Nipissing, the western end of the lake was opposite the site of Cleveland, as indicated by another dotted line. The next great lake to be released from the domination of the ice was probably Ontario, though the order of precedence is here not. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Board of Regents; United States National Museum. Report of the U. S. National Museum; Smithsonian Institution. Report of the Secretary. Washington : Smithsonian Institution
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