UDominican, ivinseti yase Beauvais, wabhala ngewaka linakhulu mabini amashumi mahlanu, nakhona wachaza mangaphi xa amafu akhusela abahambi ngenqanawa ekuboneni ilanga okanye inkwenkwezi bakhuhla ipoyinti yenalithi kwilitye elinomtsalane.
A Dominican, Vincent of Beauvais, writing about 1250, also describes how when clouds prevent sailors from seeing sun or stars they rub the point of a needle on the magnet stone.XhosaNavy XhosaNavy