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 ascribe general validity to these results, at least for my own case.

One factor in the regular course of the results obtained seems to deserve special attention. In ordinary life it is of the greatest importance, as far as the form which memory assumes is concerned, whether the reproductions occur with accompanying recollection or not,—i.e., whether the recurring ideas simply return or whether a knowledge of their former existence and circumstances comes back with them. For, in this second case, they obtain a higher and special value for our practical aims and for the manifestations of higher mental life. The question now is, what connection is there between the inner life of these ideas and the complicated phenomena of recollection which sometimes do and sometimes do not accompany the appearance in consciousness of images? Our results contribute somewhat toward the answer to this question.

When the series were repeated 8 or 16 times they had become unfamiliar to me by the next day. Of course, indirectly, I knew quite well that they must be the same as the ones studied the day before, but I knew this only indirectly. I did not get it from the series, I did not recognise them. But with 53 or 64 repetitions I soon, if not immediately, treated them as old acquaintances, I remembered them distinctly. Nothing corresponding to this difference is evident in the times for memorisation and for savings of work respectively. They are not smaller relatively