A compilation of numerous comparative dictionaries of many languages. Later used as the basis for Sravnitel'nye slovari, edited by S. Pallas (1787).
NB: In Stankiewicz (Grammars and dictionaries of the Slavic languages from the Middle ages up to 1850: An annot. bibliogr. Berlin etc.: Mouton, Cop. 1984) the author's last name is Fridrixъ, and the first name is Nikolaj.