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

"The Letter of Petrus Peregrinus on the Magnet, A.D. 1269" by Pierre is a scientific work from the 1200s that explores magnets and how they work, especially lodestones, during a time when people were just starting to study nature scientifically. The letter, written to Sigerus de Foucaucourt, shares observations and tests about magnets. It explains important ideas like how magnetic poles act, how they pull together or push apart, and using a magnetic needle to find direction. The letter looks at what lodestones are like and magnetic fields and then suggest a way to build something that moves forever using magnets. Pierre is known as an important person in physics history because he linked thinking about science with doing experiments.