The Yeniseians were followed by the UgroSamoyedes, who also came originally from the high plateau and were compelled, probably during the great migration of the Huns in the 3rd century B.C., to cross the Altai and Sayan ranges and to enter Siberia.
Darwin thought that the migration southwards would always be preponderant (Origin of Species, 5th ed., 458).
From acetylene and acetone); but according to Baeyer (Ber., 1886, 9, 1797) it fails to explain the formation of dioxyterephthalic ester from succinosuccinic ester, unless we make the assumption that the transformation of these substances is attended by a migration of the substituent groups.
The revocation of the edict of Nantes in October 1685, and the consequent migration of a large number of industrious French Protestants, caused a considerable growth in the east end of London.
The migration of the Cestode-larvae through the walls of the intestine into the blood of their host is the cause of grave disturbances, due largely to the perforation of the tissues, inflammation of the vessels and peritoneum, and other effects of these immigrants.
The theory that the ruins in Mashonaland were built by immigrants from south Arabia is now discredited, but there was certainly a continuous stream of Arab migration to East Africa which probably began in pre-Moslem times and founded a series of cities on the coast.
In some cases they survive by migration, but this is often prohibited by physical barriers, These, however, have often protected them from the competition of more vigorous invading races.
In the meantime the discovery of gold in California had swelled the stream of westward migration across the Washoe Country, and had resulted in the settlement of traders, mostly Mormons, along the routes to the gold fields.
They may pass a spot at such a depth as to evade the nets, and reappear at the surface some days after farther eastwards; they may deviate from their direct line of migration, and even temporarily return westwards.