SUBJECTIVE SPECTRAL ILLUSIONS.--Dr. Abercrombie is authority for the following illustration of subjective spectral illusions: “A gentleman of high mental endowments, and now upwards of eighty years of age, of spare habits and enjoying uninterrupted health, has been for eleven years subject to the daily visits of spectral figures. They in general present human countenances; the head and body are distinctly defined, the lower parts are for the most part, lost in a kind of cloud. The figures are various, but he recognizes the same countenances repeated from time to time, especially of late years, that of an elderly woman, with a peculiarly arch and playful expression, and a dazzling brilliancy of eye, who seems just ready to speak with him.... This female is dressed in an old-fashioned Scottish plaid of Tartan, drawn up and brought forward over the head, and then crossed below the chin, as the plaid was worn by aged women in his younger day. He can seldom recognize among the spectres any figure or countenance which he remembers to have seen; but his own face has been presented to him, gradually undergoing the change from youth to manhood, and from manhood to old age.” It is not necessary to call in the aid of an invisible being to explain such appearances. The house had been occupied by Scotch who dressed as described, and the influence they left impressed itself on the gentleman’s sensitive brain. “All houses where men have lived and died are haunted houses,” not by actual ghosts, but by the subtile force which persons impart to everything with which they come in contact. That he was subject to some influence outside of himself is shown by the appearances always being of some one that he had never seen, and hence they could not have been revived pictures from his own brain. After he had been in the house for a long time he began to see his own face; that is, after he had imparted his own influence to his surroundings, he received them back as from a mirror.