from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. reciprocal migration; interchange of dwelling place by migration
from the GNU version of the Collaborative International Dictionary of English
- n. Reciprocal migration; interchange of dwelling place by migration.
from The Century Dictionary and Cyclopedia
- n. Reciprocal migration; exchange of persons or populations between districts or countries.
Traditionally there were 50 small Latin communities which were united by common Latin cults and by the common Latin rights of intermarriage, contractual dealing, and intermigration.
But after very long intervals of time, and after great geographical changes, permitting much intermigration, the feebler will yield to the more dominant forms, and there will be nothing immutable in the distribution of organic beings.
And this continuity of the circumpolar land, with the consequent freedom under a more favourable climate for intermigration, will account for the supposed uniformity of the sub-arctic and temperate productions of the Old and New Worlds, at a period anterior to the Glacial epoch.
But there was also long established communication and to some extent intermigration between the west coast and Mohammedan countries such as
On the other hand, it cannot be denied that intermigration has also its drawbacks; that it will easily flood the labor market so as to screw down wages; it will foster the venturesome spirit, induce people to risk a certainty for an uncertainty, and especially has it tended to draw people from the rural districts to the large cities.
Admitting these highly probable connections, no bridging of the Atlantic in more southern latitudes (of which there is not a particle of evidence) will have been necessary to account for all the intermigration that has occurred between the two continents.
Malayan and all the Asiatic races, from the Papuans and all that inhabit the Pacific; and though along the line of junction intermigration and commixture have taken place, yet the division is on the whole almost as well defined and strongly contrasted, as is the corresponding zoological division of the Archipelago, into an Indo-Malayan and Austro-Malayan region.
And to this continuity of the circumpolar land, and to the consequent freedom for intermigration under a more favourable climate, I attribute the necessary amount of uniformity in the sub-arctic and northern temperate productions of the Old and New Worlds, at a period anterior to the Glacial epoch.
I doubt whether meteorological knowledge is sufficient for this deduction: turning to the S. hemisphere, it might be argued that a greater extent of water made the temperature lower; and when much of the northern land was lower, it would have been covered by the sea and intermigration between Old and New Worlds would have been checked.
We can further understand the singular fact remarked on by several observers that the productions of Europe and America during the later tertiary stages were more closely related to each other than they are at the present time; for during these warmer periods the northern parts of the Old and New Worlds will have been almost continuously united by land, serving as a bridge, since rendered impassable by cold, for the intermigration of their inhabitants.
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