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.
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.