sometimes caused in the mind, without the presence or aid of external objects, must have occurred to those who have had extensive opportunities of practically observing human nature. With several persons I have been acquainted, and those by no means of inferior understanding, who have been firmly persuaded of the existence of the spectres indicated by such nervous affections, and have, on such occasions, held conversations with them, real on their part, imaginary on the part of the supposed spectre. Such, perhaps, in general, are the disciples of the Baron Von Swedenborg. But illusions of this nature are not confined to this class of men alone. POWER OF IMAGINATION. Dr Van Cleve, of Princeton, was lately applied to as a physician on behalf of a man who had reduced himself by intemperance, to a state of very distressing nervous irregularity. He was continually disturbed by visions, sometimes of the most fantastic kind. He often heard strange voices, and would ask and answer questions, as if engaged in conversation with some of his visionary personages. His disorder, the doctor said, was evidently not of that species which is usually denominated mania, but appeared to be wholly the effect of a habit of nervous irregularity, delirium tremens, induced by previous intemperance. But the Baron Von Swedenborg, in his most visionary moments, was never surrounded by more extraordinary assemblages of strange sights. A very striking example of the power of nervous impression, occurred a few years ago in the Rev. James Wilson, formerly assistant minister with Dr Rodgers, in the first Presbyterian Church in New York. He was a native of Scotland, and was a man highly esteemed for his good sense, and the soundness of his judgment; although not distinguished for a warm and popular eloquence. Being obliged for a time to relinquish the exercise of his ministry from a hemorrhage in his breast, he employed himself for several years in different occupations in Scotland and America, but chiefly in presiding over an Academy in Alexandria, in the State of Virginia. The expectoration of blood having ceased for a considerable time, his conscience began to reproach him for indolence and self-indulgence, in not renewing his ministerial functions. In this uneasy state of mind, a vision, as he thought, of a man of very dignified aspect, stood at the foot of his bed in the morning, after he was perfectly awake, and surveying him steadily for some moments, commanded him to resume his duties in the pulpit: but added, that as considerable error had crept into the church, he should undertake to reform it according to the model of the primitive age. Mr Wilson, conscious of his want of eloquent talents, and reforming zeal, reasoned with the supposed apparition, alleging his utter incompetency to the task imposed upon him. The dialogue ended in a repetition of the command, and assurance of ability and success. The good man, wholly unable to explain this