Hans Heinrich Landolt (1831-1910) – the Great German chemist of the Second Half of the XIX Century and the First Decade of the XX Century (To the 190th Anniversary of His Birth)

Hans Landolt (1831-1910) was one of the important chemists of the second half of the XIX century and the first decade of the XX century. The purpose of this paper is to familiarize readers with the important events in the life of Landolt and his writing activities, in particular with his chemistry books. In addition, his research activities is briefly described, and especially the chemical reaction named after him.