A distinctive feature of the "Mediator Dei Hymnal" is the naming of the tunes and listing of their metric schemes. This practice is, unfortunately, all too rare in American hymn publications. It is hoped that other hymnals will in time adopt these names (they are free to do so) in order that unity in this regard will prevail in future years. Naming the tunes in a uniform manner makes the identification of these tunes a simple matter, and a knowledge of the meter enables one to apply an alternate melodic setting to a given text when this seems to be called for. The choice of names given here is proposed as a first classification for use in all future hymn collections. The accompaniment edition is adapted to the abilities of the less experienced organist.