The Letter of Petrus Peregrinus on the Magnet A.D. 1269

The Letter of Petrus Peregrinus on the Magnet is a seminal work that explores the properties of magnetism authored by Pierre de Maricourt. This treatise is notable for its systematic approach to the study of magnets detailing their behavior and the principles governing their attraction and repulsion. De Maricourt''s observations laid the groundwork for future studies in magnetism making significant contributions to both science and navigation. His work is often regarded as one of the earliest comprehensive studies on the subject showcasing the intellectual curiosity of the 13th century. *** In this letter de Maricourt introduces the concept of the magnetic compass which would later revolutionize navigation. He meticulously describes experiments with magnets including the use of iron filings to visualize magnetic fields. The clarity of his writing and the precision of his observations reflect a deep understanding of natural philosophy. This work not only influenced contemporaries but also inspired later scientists establishing a foundation for the scientific method in the study of magnetism and its applications in various fields.