Dr. Gihr'e work on the Holy Sacrifice of the Mass, here presented in new dress, has long been considered a standard treatise on the subject. It presents a thorough explanation not only of the prayers of Holy Mass and of the actions and ornaments connected with its celebration, but also of the Sacrifice of the Cross in particular. At the same time, while the explanation includes not only the precise signification of the words and a clear exposition of the history of each rite and formula, yet all controversy arising from explanations either mystical or founded on dubious evidence has been carefully avoided. A monument of research, the work has also the charm of interest, and its sections are so arranged as to form not merely chapters of historical and Archaelogical information. But also passages of rich meditation.