This procedure does, in fact, weakly magnetise a needle, and English sailors (we are told) practised 'with needle and stone' to sail the six-day voyage to Iceland during the fifteenth century.
Indlela yayisithi, ngokwenyani tyhafileyo ukuthi yenze umtsalane inalithi kwaye namaNgesi ayehamba ngolwandle (ayexelelwe) ukuba makasebenzise inalithi nelitye ukudada intsuku ezintandathu kuhambo ngenqanawa kumlambo womkhence (iceland) ngexesha leminyaka yeshumi elinesihlanu lenkulungwane.