Experiments with annealed iron gave less satisfactory results, on account of the slowness with which the metal settled down into a new magnetic state, thus causing a " drift " of the magnetometer needle, which sometimes persisted for several seconds.
In the 7th century the city seems to have settled down into a prosperous place and to have been peopled by merchants of many nationalities.
Its originator, Mahommed Ibn Abdul Wahhab, was born (1691) at Ayana in Nejd, and after studying in Basra and Damascus, and making the pilgrimage to Mecca returned to his native country and settled down at Huremala near Deraiya.
Her husband, having then acquired a fixed domicile in Lisbon, settled down to advocacy with success, and he was able to send Antonio to the university of Coimbra, where he matriculated in the faculty of law.
This distinction between the characteristics of the two races is only true in a general sense, for a considerable population of true Bedouin origin has settled down to agricultural life in the oases of Hejaz and Nejd, while in southern Arabia the tribes dwelling on the fringe of the great desert have to a certain extent adopted the nomad life.
