On March 1, 1869, Dmitry Ivanovich Mendeleev sent to the printing house a sketch of the first version of the periodic system he had developed. Mendeleev entitled this note: “An experience of a system of elements based on their atomic weight and chemical similarity.” From that moment on, D.I. Mendeleev becomes the most famous Russian scientist in the world. He remains in this status to this day. And although D.I. Mendeleev is known primarily as a chemist; he can rightfully be called a polymath - a universal person, gifted in a variety of fields. And not only science.