against the variolous infection, it required a much longer probation. Groundless as all these views were, it was exceedingly entertaining to hear the fertility of argument and analogy which he brought forward to support them. One of the subjects which occupied him at the latter end of his life, was the theory and phenomena of galvanism, which, however, he never satisfactorily mastered. Augustin's book upon this subject was about the last that he read, and his copy still retains on the margin his, pencil-marks of doubts, queries and suggestions. The infirmities of age now began to steal upon Kant, and betrayed themselves in more shapes than one. Connected with Kant's prodigious memory for all things that had any intellectual bearings, he had from youth labored under an unusual weakness of this faculty in relation to the common affairs of daily life. Some remarkable instances of this are on record, from the period of his childish days; and now, when his second childhood was commencing, this infirmity increased upon him very sensibly. One of the first signs was, that he began to repeat the same stories more than once on the same day. Indeed, the decay of his memory was too palpable to escape his own notice; and, to provide against it, and secure himself from all apprehension of inflicting tedium upon his guests, he began to write a syllabus, or list of themes, for each day's conversation, on cards, or the covers of letters, or any chance scrap of paper. But these memoranda accumulated so fast upon him, and were so easily lost, or not forthcoming at the proper moment, that I prevailed on him to substitute a blank-paper book, which I had directed to be made, and which still remains, with some affecting memorials of his own conscious weakness. As often happens, however, in such cases, he had a perfect memory for the remote events of his life, and could repeat with great readiness, and without once stumbling, very long passages from German or Latin poems, especially from the AEneid, whilst the very words that had been uttered but a moment before dropped away from his remembrance. The past came forward with the distinctness and liveliness of an immediate existence, whilst the present faded away into the obscurity of infinite distance.