In the Dominican collection, was there not to be found a certain Doctor of Theology, Révérend Père Rouard de Card, a Preaching Brother, who in a brochure entitled:--"Of the Falsification of the Sacramental Substances," has demonstrated beyond a doubt that the major part of Masses were null and void, by reason of the fact that the materials used in the rite were sophisticated by dealers?
For years, the holy oils had been adulterated with goose-grease; the taper-wax with burnt bones; the incense with common resin and old benzoin. But worse than all, the substances indispensable for the holy sacrifice, the two things without which no oblation was possible, had likewise been falsified,--the wine by repeated dilutings and the illicit addition of Pernambuco bark, elder-berries, alcohol, alum, salicylate, litharge; the bread, that bread of the Eucharist that must be kneaded of the fine flour of wheat, by ground haricotbeans, potash and pipeclay!
Nay, now they had gone further yet; they had dared to suppress the wheat altogether and shameless dealers manufactured out of potato meal nearly all the hosts!
Now God declined to come down and be made flesh in potato flour. This was a surety, an indisputable fact; in the second volume of his Moral Theology, His Eminence Cardinal Gousset had also dealt at length with this question of adulteration from the divine standpoint...
By reason of the easy manipulation of this meal and the good appearance presented by the unleavened cakes made of this substance, the unworthy and fraudulent substitution had become so widely prevalent that the mystery of the transubstantiation could hardly be said to exist any longer, and priests and faithful laymen communicated, all unwittingly, with neutral elements!
http://www.ibiblio.org/eldritch/jkh/r16.htmlTherefore no one has actually experienced the eucharist in the last 150 years or more.