The problem with which this investigation is concerned is the determination of compositional styles in terms of manners of employing monadic and dyadic intervals in the music of the common practice period. An aspect for determining style is proposed by way of comparing the frequency of occurrence of dyads and monads in selected musical examples from the baroque, classical, and romantic periods. Chapter I is a discussion of the problem and methodology of the study. Chapters II, III, and IV present analytic comparison of examples in the baroque, classical, and romantic periods respectively. Chapter V presents a summary of the findings with references to the pedagogical applications of the two-part framework principle.

Santa Eulalia M. Md. 7, dated January 20, 1600, is part of the San Miguel Acatán Repertory, which originated in the northwestern highlands of Guatemala and is presently owned by the Lilly Library of Indiana University. The manuscript contains thirty-four four-part songs and dances, two thirds of which are villancicos for Christmas, Easter, the Eucharist, and the feasts of All Saints and St. Michael. The remaining third consists of Latin biblical texts in either fabordón or contrapuntal settings, three pieces with Náhuatl texts, and an instrumental pavana. The thesis contains a modern edition of Santa Eulalia M. Md. 7 with critical notes and commentary, a comparison of the pieces with villancicos and fabordones of European origin, and a survey of several aspects of Mayan culture.

The Novelletten of Robert Schumann stand out as unusual among his works for solo piano. It is the largest cycle of character pieces in his output and has other distinguishing features. One unusual aspect of the work is its abundance of literary references which Schumann revealed at various points when it was being composed. This is an aspect unique to this cycle since Schumann's other cycles refer to a single literary source. One of the purposes of this paper is to discuss these numerous literary references which have never been examined in any detail before. Present in the Novelletten is a use of musical motives from works of his wife Clara. There are also musical references to other composers such as Beethoven and Haydn. This quoting of himself and others is not an uncommon practice for Schumann but here, in context with remarks made by Schumann himself about the work, the nature of his use of these musical references becomes more transparent. One of the main points being made through this discussion of literary and musical references in the Novelletten is that partly through these elements the work is unified into an eight movement cycle.

The neo-classic movement in Italy, which gained momentum in the early 1920's, was rooted in an instrumental style patterned after that of the Baroque era. The term "new classicism," proposed by Ferruccio Busoni in 1920, represented a reaction against the extreme chromaticism and large performance forces of the late nineteenth century. The pianistcomposer Alfredo Casella, after earlier periods in which he was influenced by such diverse composers as Mahler, Debussy, and Schoenberg, soon became the chief spokesman for the neoclassic movement in Italy. Casella considered the Sinfonia, Arioso and Toccata his most important work for the piano, because of its size and musical content. It is notable for its usage of thematic transformation, much of which is based on the interval of a fourth or fifth. This study includes a formal outline of each movement, showing sectional divisions and tonal regions, as well as illustrations of thematic transformation and intervallic patterns. Also discussed are the work's neoclassic style characteristics, including counterpoint, pandiatonicism, modality, and linear cadential treatment.