In discussing the views of leading linguistics on the specific features of Slavic negation, the author reviews mainly Czech material and compares it with Russian and English works. This paper is part of a larger work on negation in which it is argued that a language system is a dynamic system based on oppositions (with predominant binary oppositions) where negation is latently present in weighing distinctions and discerning essentials from unessentials (i.e., in the lexical system, in denoting concepts) and before uttering judgments (i.e., in syntax). The theories of the following linguists are discussed in the present work: (1) van Ginneken, (2) Gebauer, (3) Travnicek, (4) Jespersen, (5) Mathesius, (6) Vachek, and (7) Skalicka. Otto Jespersen's "Negation in English and Other Languages," which explains a fluctuation in the development of negative expressions, is treated in some detail. The author gives recommendations for needed research on the semantics of the lexical system. The bibliography includes works consulted in the author's larger work but not cited here. (PM)