Mendeleev readings — a solemn act, the annual reports of leading Soviet/Russian scholars on topics affecting all areas of chemistry and its related sciences: physics, biology and biochemistry. Date of readings is due to two dates: birthday of Dmitri Mendeleev (8 February 1834), and sending messages to them on the opening Periodic Law (March 1869). Mendeleev reading had read the presidents and vice presidents of the USSR Academy of Sciences (after 1991 — Russian Academy of Sciences (RAS)), Active and corresponding members of the Academy. Minister, Nobel laureates, professors.