The exercises opened with an address of welcome by Mayor Cregier, followed by a speech from Mr. Peck, President of the Association, who received an ovation. President Harrison's address was followed by the rendition of the hymn "America" by the Apollo Club of 500 trained voices. Hon. John S. Runnells delivered the dedicatory oration. Then came the real event of the day--"Home, Sweet Home" and the "Swiss Echo Song" by the incomparable songstress Adelina Patti, who shared the honors of the occasion with the President. The programme concluded with an address by Governor Fifer and the grand "Hallelujah" chorus from "The Messiah." As Mr. Peck introduced President Harrison the great assembly enthusiastically testified its welcome. The President spoke as follows: _Ladies and Gentlemen_--Some of my newspaper friends have been puzzling themselves in order to discover the reason why I left Washington to be present here to-night. I do not think I need, in view of the magnificent spectacle presented to us here to-night, to state the motives which have impelled my presence. Surely no loyal citizen of Chicago who sits here to-night under this witching and magnificent scene will ask for any other reason than that which is here presented. [Applause.] I do most heartily congratulate you upon the completion and inauguration of this magnificent building--without an equal in this country, and, so far as I know, without an equal in the world. [Applause.] We have here about us to-night in this grand architecture, in this tasteful decoration, that which is an education and an inspiration. [Applause.] It might well tempt one whose surroundings were much farther removed from this scene than is the capital city to make a longer journey than I have done to stand for an hour in the view of such a spectacle of magnificence and grandeur and architectural triumph as this. [Applause.] And if that be true, surely there is reason enough why the President may turn aside for a little while from public duty to mingle with his fellow-citizens in celebrating an event so high and so worthy of commemoration as this triumph to-night. [Prolonged applause.] Not speech, certainly, not the careless words of an extemporaneous speech, can adequately express all the sentiments I feel in contemplating the fitting culmination of this deed. [Applause.] Only the voice of the immortal singer can bring from these arches those echoes which will tell us the true purpose of their construction. [Applause.] You will permit me, then, to thank you, to thank the Mayor of Chicago, to thank the President of this Association, and to thank all those good citizens with whom I have to-day been brought in personal contact, for the kindness and respect with which you and they have received me; and you will permit me to thank you, my fellow-citizens, for the cordiality which you have kindly displayed here to-night.