Graduated from Leipzig University, 1908; Kiev University, 1909; Petrograd Politechnical Institute, 1914-1918. Chief Board of Weights and Measures, 1914-1918 (Petrograd); Kiev Poiltechnical Institute, 1918-1930, professor since 1921 Kiev University, professor 1929-1938; Kiev scientific research chair for physics, director, 1923-1929; Kiev research Institute for Physics, director, 1929-1938; arrested in 1938, since 1944 worked in Russian province; since 1959, in Physical Institute Ukranian Academy of Science (Kiev).