X.
FOR MENTAL PRAYER OR OTHER SPIRITUAL EXERCISES.
_Plenary_.--Once a month, for at least a quarter of an hour's
mental prayer every day for a month: Confession and Communion.
_Plenary_.--Any one day in the year, for prayer, mortification,
and other good works for 40 days, in memory of our Lord's 40
days in the desert.
7 _years_ and 7 _forty days_ for every half hour of mental
prayer.