USE OF THE CONFITEOR.—The prayer is said sometimes as a double form of mutual confession, first by the celebrant to the people and then by the people to him, and sometimes only once, as a single form. As a double form it is used: (I) as part of the introductory prayers of Mass...
The ordinary “totum duplex” feast is equivalent to the Roman greater double. A “totum duplex” with an ordinary octave (a simple or a solemn octave) is equal to the second-class double of the Roman Rite, and a “totum duplex” with a most solemn octave is like the Roman first-...
Feasts are either double or simple, the former being subdivided into principal doubles, non-principal doubles, greater doubles, etc. Simple feasts (among which are reckoned days within octaves) have only three lessons at Matins, though the nocturn preceding these is sometimes of three, sometimes ...
On “solemnitates Domini” the first Hallelujah is doubled. In Lent, on the Litany days, the “Feriae de Exceptato” and Vigils, the Cantus, answering to the Roman Tractus, takes the place of the Hallelujahs and Versus. On some “Solemnitates Domini” there is an “Antiphona ante ...