15th century illustration depicting a geographer with lodestone,by Stradanus. Lodestone is a naturally magnetized piece of the mineral magnetite that was used in the first compasses. Its importance to early navigation is evinced by its name,which means 'leading stone' in Middle English | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Omikron |
Taille de l’image : | 3624 px × 2543 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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