John Field (1782-1837), an Irishman, was the first composer to use the French term "nocturne," and was the inventor of the nocturne for piano. It can be seen with a glance at the scores that the orchestral notturni by the eighteenth century composers were very different than what is generally thought of today as a nocturne. Field introduced the idea of the nocturne that has remained much the same since. Frederic Chopin enlarged and improved the genre invented by Field, but it was Field's originality that brought this type of piece to piano literature. Indeed, John Field is hardly remembered today except as the inventor of the nocturne for the piano and for his influence on Chopin's Nocturnes. For that alone musicians will remain indebted to him.

The Revolution of 1910 in Mexico marked a great political and social upheaval. At the same time a recasting of Mexico's music occurred. Modern Mexican music is a unique combination of the influence inherited from Europe and the indigenous music of the country. This work attempts to trace the development of that combination. Chapter I gives a background of music in Mexico through Pre-Cortesian times, the colonial period and the operatic nineteenth century. Chapter II deals with the men who shaped present day music in Mexico. Chapter III is an analysis of selected twentieth century piano works. The analysis shows the tendencies of ten Mexican composers in their use of melody and rhythm. It includes a discussion of harmonic structure and tonality. The composers whose works were chosen for consideration in the analysis range from Manuel M. Ponce, considered the father of modern Mexican music, to Carlos Chavez, recognized as the outstanding exponent of music in Mexico today.