Musicology Annotation << Back «Period» and «Periodical» Forms in French Organ Music of the 18th Century Marina N. Tchebourkina This article is the third one in the series of «Music Theory and practice of the French Baroque Organ». It is devoted to the analysis of French organ music forms used in the 18th century and based on the phenomenon of metric extrapolation. Revealing the deep relationship between the concepts of «song-form» («Liedform») and the French «Period», the author appeals to the term «periodical» forms. In their line he analyzes a «small» and «great» periods, «united periodical form», variations-form, rondo. The article contains the table of correspondences between French Baroque terms and contemporary Russian terminology. Keywords: organ, French Baroque, period, metric extrapolation, song-form, variations-form, rondo. Contacts: marina.tchebourkina@dbmail.com Pp. 02-09.