PROF. NICOLAI ALEXANDROVICH MENSCHUTKIN, who died on February 5, was born in St. Petersburg on October 24, 1842. After finishing his studies at the St. Petersburg University, he went abroad and worked in the laboratories of Schtreker in Tflbingen, WOrtz in Paris, and Koibe in Marburg. On his return to St. Petersburg in 1865, he read his dissertation for the degree of Master of Chemistry on “The Hydrogen of Phosphorous Acid and, its Incapacity to be replaced by Metals.” In 1867 he began to lecture on chemistry at the St. Petersburg University. He also gave special lectures on organic chemistry, and was head of the analytical laboratory. In 1885 he left the analytical department and devoted himself entirely to teaching organic chemistry. His doctor's dissertation was on “The Synthesis and Properties of Hydrocarbons.” In the seventies of last century he was secretary, and in the eighties rector, of the Physico-mathematical Faculty. In recent years he left the University and lectured at the Polytechnic Institute of St. Petersburg.