Professor at Saratov and Moscow Universities Sergei A. Boguslavsky (1883-1923)

Background and Objectives: The article systematizes biographical information about Sergey A. Boguslavsky, an outstanding Russian theoretical physicist of the first quarter of the 20th century, one of the first professors of the Faculty of Physics and Mathematics of Saratov University (1918-1921). In 1911-1922, he carried out important theoretical works in the field of crystal physics, pyroelectricity, thermodynamics, hydrodynamics and vacuum electronics. Boguslavsky's life was complicated by some serious illness. Materials and Methods: By writing this article, the scientific works by Sergey A. Boguslavsky, the memoirs of his contemporaries - employees of Göttingen, Moscow and Saratov universities, data from the archive of Saratov State University were used. Conclusion: The significance of scientific works by Sergey A. Boguslavsky for physics of his time and their interest in the context of history of physics, methodology of representing fundamental and practical results of scientific creativity, organizing higher education in complex public and personal circumstances, and preservation of historical memory are noted. The article is the most complete biography of Sergey A. Boguslavsky.