In this work is found a study of Catholic prayer in its different aspects, and gives such explanations as considered necessary to enable everyone to understand the books containing the Liturgy and to take an intelligent interest in the ceremonies of the church. In order to attain the end more surely, and that a taste for Catholic Liturgy may be acquired, a number of extracts have been given, so that this book has become in that respect a kind of liturgical anthology or a euchology. The object in so doing was that the devout may sometimes make use of it in their private meditations and prayers.