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The universal geography : earth and its inhabitants

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LAKES. 96tops <strong>and</strong> headl<strong>and</strong>s are now surrounded by peat beds, swamps, <strong>and</strong> marshy pasturel<strong>and</strong>s.A careful study of these low-lying tracts shows that they were formerlylakes or navigable gulfs, <strong>and</strong> here are sometimes still found the remains of boats.Fig. 47. Lakes Wexer <strong>and</strong> Wettbb.Scale 1 : 1,600,000.Lake bottom sulitLelow the level ofthe Baltic.<strong>The</strong> fastnesses were accordingly defended, partly at least, by water, <strong>and</strong> nearlyall the Swedish towns had their origin in such insular strongholds.<strong>The</strong> larger Swedish lakes are themselves an index of the gradual drying up ofthe l<strong>and</strong>. Formerly continuously united, they formed a strait connecting the

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