Shakespeare's natural eye was clear indeed, but none the less he seems to have seen everything with the eye of his mind. Faraday so saw the world of force, Newton of mathematical law, and Tyndall's scientific use of the imagination lies in the same direction. And so the man of science and the poet have much in common. Both use the natural world, and the imagination is for each an instrument of effort. The poet's generalization is a splendid vision in a world ideal, suggested, no doubt, by what is actual and liable here and there to coincide with truth; the generalization of the scientific man is likewise a vision, but it rests upon the actual, upon the ascertained fact at the greatest number of points possible, and disappoints us only that it is not everywhere coincident. The poet dreams of Atlantis, the lost continents, the islands of the blest, and builds us pictures that vanish with his song; the man of science too beholds the continents rise; scene after scene he likewise makes to pass across our startled vision; but his are history, his tapestries are wrought in the loom of time. The poet writes the book of Genesis, with the herbs bringing forth fruit after their kind; the man of science figures fossil leaves and cones and fruit. Only at the last do poetry and science possibly again agree: "The cloud-capped towers, the gorgeous palaces, The solemn temples, the great globe itself-- Yea, all which it inherit shall dissolve, And like this insubstantial pageant faded, leave not a rack behind!" And when the man of science gathers all his data, and collates fact with fact, and builds the superstructure of his vision, with him, too, all things fade and vanish in the infinity of the future. AMERICAN INDUSTRIAL EXPOSITIONS--THEIR PURPOSES AND BENEFITS. BY MARCUS BENJAMIN, PH. D. Industrial expositions are a natural development of the fairs of the middle ages. The latter are believed to have originated in the religious gatherings which afforded an opportunity for the sale of wares to large numbers of people. Such fairs still persist in northern Europe, and the best known of them is probably that held three times a year in Leipsic, to which, it is said, "some twenty-five or thirty thousand foreign merchants" are still attracted each year.