Ignorance of the basic principles of music reading was one of the primary obstacles to the improvement of congregational singing in nineteenth-century America. Six separate numeral notation systems arose to provide a simple way for the common man to learn the basic principles of music. Hartley Day developed his own numeral notation system and published six tune-books that enjoyed modest success in the New England area. This thesis examines Day's numeral notation system as it appeared in the Boston Numeral Harmony (1845), and the One-Line Psalmist (1849). It also studies Day's periodical, The Musical Visitor, in which he continually attacked Lowell Mason, possibly leading to Mason's dismissal as Superintendent of Music of Boston's public schools.

Specialized training in English diction for singers became increasingly prevalent in the twentieth century. Along with this growth, a small but significant literature on the subject developed. There are divergent practices recommended for American singers, displayed by nine authors in ten books published between 1900 and 1971. A comparative study yields pedagogies of vowel and consonant production. Issues of sounds in context, including proper linkage and stress, adjustments from speech to song, and practices dictated by musical style, are paramount. The literature demonstrates an increased use of International Phonetic Alphabet symbols as a pedagogical tool. The areas of kinesiology and acoustical research are suggested for further study.