The salter waters apparently tend to make their way westwards close to the African coast, and at the bottom the highest salinities have been observed south of Crete.
Avicenna seems to have declined the offers of Mahmud the Ghaznevid, and proceeded westwards to Urjensh in the modern Khiva, where the vizier, regarded as a friend of scholars, gave him a small monthly stipend.
The second branch proceeds north-westwards towards the West Indies, where it mingles with the waters of the northern equatorial; and the two drifts, blocked by the
Archbishop Poppo and his successors in the i 1 th and 12th centuries extended the cathedral westwards and added an apse at each end.
At the close of the glacial epoch the north Asiatic flora spread westwards into Europe and intermingled with the surviving vegetation.