[l] Note.--It is sometimes customary, with a view of scrupulously consuming the entire of the consecrated wine, to cleanse the chalice with a little wine previously to using water; and not to pour away any water thus used until it is absolutely certain that all the consecrated species has been consumed. In the rare cases where wine has been consecrated in the flagon, that vessel must be cleansed with the same care as the chalice.