The fulfilment of mind is truth, or a correct representation of facts, not as they are now and here, but as, according to conditions which constitute a given state of things, they must be here and everywhere. Mind expands in the measure that it contains and reflects the eternity of truth. The activity of mind is in one respect as transient a process as is the phenomenon of light. Yet in other respects mind is able to grasp eternity within the narrow span of the moment. PAUL CARUS. THE MAGIC MIRROR. The famous time-honored saying of Rabbi Ben Akiba, "There is nothing new under the sun," has often been verified to our astonishment in the history of the sciences. No observation is proclaimed that has not been made before, no position upheld that has not been before maintained. The more extensive the survey that one acquires over any given province of science, and the more deeply one penetrates into the past history of that science, the more surely will one arrive at the conviction, that even that which is apparently very new is at bottom old. But the unceasing progress of the natural and mental sciences, on the other hand, is an indisputable fact; and the true characteristic of this progress must consequently be sought in some other element than in the accession of new material. The subject-matter with which science deals, remains almost unchanged throughout prolonged periods of time; the treatment of that material alone changes. Accordingly, the factor that determines the extension of our knowledge is pre-eminently the growing comprehension that proceeds from the illumination of that which was before in our possession. Apples fell from trees in all ages, but Newton was the first who placed the event in its proper light, thereby creating a tangible principle by means of which a great number of other phenomena were successfully apprehended. Our system of scientific ideas was increased by the addition of one conception that illuminated phenomena hitherto but half or not at all explained.