It would appear not. In order to reproduce several times an impression by employing a suitable physical stimulus, it is necessary that this stimulus be not changed, and that the organism remain in the same psychical conditions as those in which was experienced the impression that it is desired to reproduce. Now it is a fact, that the physical stimulus is continually changing, and in like manner the psychological conditions. Oil paintings grow dark, frescoes pale, statues lose noses, hands, and legs, architecture becomes totally or partially a ruin, the tradition of the execution of a piece of music is lost, the text of a poem is corrupted by bad copyists or bad printing. These are obvious instances of the changes which daily occur in objects or physical stimuli. As regards psychological conditions, we will not dwell upon the cases of deafness or blindness, that is to say, upon the loss of entire orders of psychical impressions; these cases are secondary and of less importance compared with the fundamental, daily, inevitable, and perpetual changes of the society around us, and of the internal conditions of our individual life. The phonic manifestations, that is, the words and verses of the Dantesque _Commedia_, must produce a very different impression on a citizen engaged in the politics of the third Rome, to that experienced by a well-informed and intimate contemporary of the poet. The Madonna of Cimabue is still in the Church of Santa Maria Novella; but does she speak to the visitor of to-day as she spoke to the Florentines of the thirteenth century? Even though she were not also darkened by time, would not the impression be altogether different? And finally, how can a poem composed in youth make the same impression on the same individual poet when he re-reads it in his old age, with his psychic dispositions altogether changed? [Sidenote] _Critique of the division of signs into natural and conventional._