EN
The place of alchemy in Isaac Newton’s thought is very interesting. Many historians do not believe that alchemy plays any significant role in his philosophy. According to them, its role is entirely minor. This article tries to show that Newton took alchemy very seriously and was even fascinated by it. He looked to alchemy for answers to the most important philosophical questions: about the ether, the primitive particles of nature, and even about God. His alchemical experiments have a very interesting, scientific context.