The Earth as Modified by Human ActionMarsh, George P. (George Perkins)
History
The Earth as Modified by Human Action
Marsh, George P. (George Perkins)
Conservation of natural resources; Human geography; Nature -- Effect of human beings on; Physical geography
The Adams of modern botany and zoology have been put to hard shifts in
finding names for the multiplied organisms which the Creator has brought
before them, "to see what they would call them;" and naturalists and
philosophers have shown much moral courage in setting at naught the law
of philology in the coinage of uncouth words to express scientific
Ideas. It is much to be wished that some bold neologist would devise
English technical equivalents for the German verwildert, run-wild, and
veredelt, improved by cultivation.]
Transfer of Vegetable Life.
It belongs to vegetable and animal geography, which are almost sciences
of themselves, to point out in detail what man has done to change the
distribution of plants and of animated life and to revolutionize the
aspect of organic nature; but some of the more important facts bearing
on the first branch of this subject may pertinently be introduced here.
Most of the cereal grains, the pulse, the edible roots, the tree fruits,
and other important forms of esculent vegetation grown in Europe and the
United States are believed, and--if the testimony of Pliny and other
ancient naturalists is to be depended upon--many of them are
historically known, to have originated in the temperate climates of
Asia. The agriculture of even so old a country as Egypt has been almost
completely revolutionized by the introduction of foreign plants, within
the historical period. "With the exception of wheat," says Hehn, "the
Nile valley now yields only new products, cotton, rice, sugar, indigo,
sorghum, dates," being all unknown to its most ancient rural husbandry.
[Footnote: On these points see the learned work of Hehn, Kultur.
Pflanzen und Thiere in ihrem Uebergang aus Asien, 1870. On the migration
of plants generally, see Lyell, Principles of Geology, 10th ed., vol.
ii., c.] The wine grape has been thought to be truly indigenous only in
the regions bordering on the eastern end of the Black Sea, where it now,
particularly on the banks of the Rion, the ancient Phasis, propagates
itself spontaneously, and grows with unexampled luxuriance. [Footnote:
The vine-wood planks of the ancient great door of the cathedral at
Ravenna, which measured thirteen feet in length by a foot and a quarter
in width, are traditionally said to have boon brought from the Black
Sea, by way of Constantinople, about the eleventh or twelfth century.
Vines of such dimension are now very rarely found in any other part of
the East, and, though I have taken some pains on the subject, I never
found in Syria or in Turkey a vine stock exceeding six inches in
diameter, bark excluded. Schulz, however, saw at Beitschin, near
Ptolemais, a vine measuring eighteen inches in diameter. Strabo speaks
of vine-stocks in Margiana (Khorasan) of such dimension that two men,
with outstretched arms, could scarcely embrace them. See Strabo, ed.
Casaubon, pp. 78, 516, 826. Statues of vine wood are mentioned by
ancient writers.
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