What can be said of the whole Exposition with reference to its extent and the order in which everything is arranged, I may well say concerning the departments of science, especially interesting to us. In this hour in which the Congress of Arts and Science is being opened, we shall not express any thanks to those who took this part of the work upon their shoulders--a more difficult task indeed than all the others, for here the problem is not to manage materials, but heads and minds. And as I see here assembled a large number of German professors--I, too, belong to the profession--of whom it is said, I know not with how much justice, that they are hard to lead, the labors of the Directors and Presidents of the Congress could not have been, and are not now, small. Neither shall we to-day prophesy into what the Congress may develop. The greater number of speakers cannot expect to have large audiences, but even to-day we can safely say this: the imposing row of volumes in which shall be given to posterity the reviews here to be presented concerning the present condition, and future problems of the sciences and arts as they appear to the scientific world at the beginning of the twentieth century, will provide a monumental work of lasting value. This we may confidently expect. The thanks which we to-day do not wish to anticipate in words, let us show by our actions to our kind American hosts, and especially to the directors of the World's Fair and of this Congress. With exalted mind, forgetting all little annoyances which may and will come, let us go forward courageously to the work, and let us do our best. Let us grasp heartily the open hand honestly extended to us. May this Congress of Arts and Science worthily take part in the great and undisputed success which even to-day we must acknowledge the World's Fair at St. Louis. For Austria Dr. Theodore Escherich, of the University of Vienna, responded as follows:-- In the name of the many Austrians present at the Congress I express the thanks of my compatriots to the Committee which summoned us, for their invitation and the hospitality so cordially extended....