The fistula is a Catholic liturgical object of exclusive use of the pope in the solemn papal masses. It is a golden cannula with which the consecrated wine was sipped. Gradually, this object has fallen into an almost total disuse. At the solemn papal masses, the pope communicated not on the altar, but on the throne, where the species were taken by the ministers. With this instrument, an accident was first prevented which accidentally spilled the wine consecrated (due to the dimensions of the papal chalice or the age of the Roman Pontiff). Second, because the deacon and the subdeacon at the papal mass, after receiving from the hands of the pope each a particle of the large host, returned to the altar also received from the chalice, and it seemed more worthy to do so by that curious golden canute.
Also, it is that the canuto makes impossible the sunrise of the particle that is in the chalice since before the Agnus Dei. This is consumed by the apostolic subdeacon directly from the chalice, in which a little Sanguis has been left for that purpose. The deacon and the subdeacon of the papal mass, after the communion of the pope on the throne, and having communicated themselves at the hands of the pontiff, returned to the altar of Confession with the chalice containing the remaining Sanguis and with the patena and the asterisk, without the form that had been consumed in the communion. Purification
At the altar they consumed the wine as follows: the deacon sipped at the top of the canuto, where the nozzle is, and then the subdeacon sucked the remaining drops into the fistula at the bottom of the canuto. He left the fistula in a glass vessel, the rest of the wine and the particle of the chalice, and then the lavender or purification of the sacred vessels was carried out.
The chalice was purified as usual, with wine, then with wine and water consumed by the deacon. Then the cup of the chalice was placed on the glass bowl and water was spilled in and out of the glass.
The asterisk and the paten were purified on the suspect glass vessel, only with water.
Finally, it was all dried up with two large purifiers.
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