D. I. Mendeleyev’s and W. F. Ostvald’s dissertations in chemistry and their scientific and didactic values
The stages of scientific creativity reflected in dissertations on competition of scientific degrees of the candidate (bachelor), the master and the doctor of sciences of graduates of the Russianhigher educational institutions great chemists D. I. Mendeleyev and W. Ostvald are presented. It is estimated scientific and didactic values of results of dissertational researches in chemistryexecuted by outstanding graduates of the Main Teacher Institute and Derptsky University of the Russian Empire in XIXth century.