The ice age in North America and its bearing upon the antiquity of man5th edwith many new maps and illus., enland rewritten to incorporate the facts that bring it up to date, with chapters on Lake Agassiz and the Probable cause of glaciation . Fig. 117—Nlplssing Great Lakes and Champlain Sea. Numerous isobases give altitudeabove sea level of the highest exposed shore. Isobases of Michigan and Huron b?.slnsby Taylor and Goldthwalte. o 1—1 -rl - s •. MiltL. Si4 0 H &- to > . a < 125 o. ^ ^, *-a 3fc y

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Keywords: ., bookauthoruphamwarren18501934, bookcentury1900, bookdecade1910