trust that the infinite Sustainer of the universe "will not put us to permanent intellectual confusion." For in this mode of statement the harmony between the scientific and the religious points of view is well brought out. It is as affording the only outlet from permanent intellectual confusion that inquirers have been driven to appeal to the principle of continuity; and it is by unswerving reliance upon this principle that we have obtained such insight into the past, present, and future of the world as we now possess. The work just mentioned [1] is especially interesting as an attempt to bring the probable destiny of the human soul into connection with the modern theories which explain the past and future career of the physical universe in accordance with the principle of continuity. Its authorship is as yet unknown, but it is believed to be the joint production of two of the most eminent physicists in Great Britain, and certainly the accurate knowledge and the ingenuity and subtlety of thought displayed in it are such as to lend great probability to this conjecture. Some account of the argument it contains may well precede the suggestions presently to be set forth concerning the Unseen World; and we shall find it most convenient to begin, like our authors, with a brief statement of what the principle of continuity teaches as to the proximate beginning and end of the visible universe. I shall in the main set down only results, having elsewhere [2] given a simple exposition of the arguments upon which these results are founded. [1] The Unseen Universe; or, Physical Speculations on a Future State. [Attributed to Professors TAIT and BALFOUR STEWART.] New York: Macmillan & Co. 1875. 8vo. pp. 212. [2] Outlines of Cosmic Philosophy, based on the Doctrine of Evolution. Boston: J. R. Osgood & Co. 1875. 2 vols. 8vo.