Photo by Yu. Mebius, Moscow, 1883 6.4 х 10.5 cm Autograph on the back: “To Ms. Dobroliubova from V. Davydovsky. Mary 5, 1883.” Vasiliy Fedorovich DAVYDOVASKY (Давыдовский Василий Фёдорович) (?—1928), professor of physics and Dean of the Department of Physics and Mathematics at the Moscow Higher Courses for Women, inspector of Moscow University (since 1897), and professor at the Dean of the Department of Physics and Mathematics, Moscow University (1917-1922?). DAVYDOVSKY, V. F. (Давыдовский В. Ф.)