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rocks 1869 1872
by drifted icebergs and coast-ice, 1859 1860 1861 1866

OMIT 1869 1872
with remarkable clearness 1859 1860 1861 1866

of miles of lowlands, where
the
....
Alpine species could not possibly exist, is one of the most striking cases known of the same species living at distant points, without the apparent possibility of their having migrated from one
to
point to
the other. It is indeed a remarkable fact to see so many
of
plants of
the same
plants
species
living on the snowy regions of the Alps or Pyrenees, and in the extreme northern parts of Europe; but it is far more remarkable, that the plants on the White Mountains, in the United States of America, are all the same with those of Labrador, and nearly all the same, as we hear from Asa Gray, with those on the loftiest mountains of Europe. Even as long ago as 1747, such facts led Gmelin to conclude that the same species must have been independently created at
many
several
distinct points; and we might have remained in this same belief, had not Agassiz and others called vivid attention to the Glacial period, which, as we shall immediately see, affords a simple explanation of these facts. We have evidence of almost every conceivable kind, organic and inorganic,
that
that,
within a very recent geological period, central Europe and North America suffered under an
Arctic
arctic
climate. The ruins of a house burnt by fire do not tell their tale more
plainly,
plainly
than do the mountains of Scotland and Wales, with their scored flanks, polished surfaces, and perched boulders, of the icy streams with which their valleys were lately filled. So greatly has the climate of Europe changed, that in Northern Italy, gigantic moraines, left by old glaciers, are now clothed by the vine and maize. Throughout a large part of the United States, erratic
boulders,
boulders
and
rocks
....
scored rocks plainly reveal a former cold period.
The former influence of the glacial climate on the distribution of the inhabitants of Europe, as explained OMIT by Edward Forbes, is substantially as follows. But we shall