О фонеме

This is a transcript of a lecture entitled On the Phoneme, given in Russian by Roman Jakobson in lecture hall 272 of the University of Sofia before an audience of over 800 students, lecturers and participants in the 5th Congress of Slavists, held in Sofia in September 1963. The text was recorded, transcribed and edited by M. Yanakiev, N. Kotova and Zh. Boyadzhiev.