Sir JOHN A. MICDONALD was then requested to address the meeting. As he came forward, looking as vigorous and cheery as if time had consented to roll backwards in his favour, the enthusiasm and delight of the audience found vent in a perfect ovation of applause. On all sides among our visitors, as well as our own citizens, were heard expressions of genial interest on the one hand and of delight on the other. Sir John gained the heart of the audience at once, and, after the applause had subsided, said:--I really do not know in what capacity I am called upon to address this audience, whether it is as a scientist or as a Canadian or as a member of the government. I cannot well say--I will say, however--I come here as a scientist. I am not yet settled in my own mind to which section I will attach myself. I think I will wait awhile, use my Scotch discretion, hear all that has to be said on all those questions before finally deciding. (Laughter.) We all cordially join in the sentiments expressed in the address from the corporation. It was a great pleasure to us all in Canada to know there was a possibility of the British Association extending their visits to Canada. I first thought, when the proposition was made, it was asking too much, but the cordial response made and the large attendance, showed these fears were not well founded. I am glad the weather is fine, the country is prosperous, the fields are groaning with products, and altogether we put on our best clothes to do honour to those gentlemen who have honoured Canada (applause and laughter), and I really hope they will not be disappointed. I can assure them, if they wanted the assurance, the people of Canada are proud and grateful for their visit. If there are any shortcomings among us it is because we are a young country; but we will do our best any way and you must take the will for the deed. (Applause.) I am sure I express the sentiments of all in giving the Association a most hearty greeting to the Dominion of Canada. (Loud applause.) The national anthem was then sung by the entire audience, and on three cheers being given for the Queen, the meeting dispersed. THE GENERAL MEETING. The first general meeting of the Association was held in the Queen's Hall at eight o'clock last evening, the hall being crowded to its utmost capacity, many having to stand, while others were unable to obtain admission. Sir William Thomson occupied the chair, and beside him on the platform were His Excellency the Governor General and Lady Lansdowne and suite, the Right Hon. Sir John Macdonald, and the president-elect, the Right Hon. Lord Rayleigh. His EXCELLENCY THE GOVERNOR-GENERAL was first introduced, and delivered the following address of welcome:--