Albert Poisson is a famous French alchemist of the 19th century, the author of a number of works on hermetic philosophy. There is not a single lover of hermetic philosophy who would not be familiar with his works, especially with the work "Theories and Symbols of Alchemists," and each of them begins his ascent from this book. Nikolai Morozov in his book "In Search of the Philosopher's Stone" quotes Poisson: