The paper focuses on selected folklorist and ethnological activities during the interwar period, financially supported by the Board for the Research of Slovakia and Subcarpathian Ruthenia, which was established on the initiative of T. G. Masaryk as part of the newly created Slavic Institute in Prague in 1928. This institution aimed to support links between Slovakia and the so-called Czech historical lands and the expressions of "mutuality" in the scientific, cultural or ethnic and language area, etc. The Board provided grants for conducting dialectological, folklorist, geographical and other projects, e.g. for the collection initiative of F. Wollman and his students in Bratislava and Brno in 1928-1947, covering Slovak and (yet unprocessed) Moravian folk fiction. Support was also granted to the research of music culture (D. Orel, K. Hudec, F. Zagriba, etc.), the collection of anthropological and ethnographical materials (K. Chotek, K. Domin, etc.), the study of Slovak folk embroidery (V. Praiik), folklore customs and practices (P. Bogatyrev), folk wood architecture (V. SiZynskyj, D. Stranska), Slovak dialects studied, for example, by V. Vainjr, member of the Board, etc. The Slovak Encyclopaedia project, today already forgotten, was not completed. Its editors included historian V. Chaloupeckf and, in particular, K. Chotek who prepared the concept of the work in 1930.