Everything combined to favour the opening day of the British Association meeting yesterday. Bright skies overhead, and weather not too warm, and tempered by a cooling breeze, made what outdoor work had to be done pleasant and prevented indoor proceedings from being oppressive. Adding to these conditions the general enthusiasm which prevailed, the presence of so many notable personages, distinguished in the worlds of science, of politics, of letters and of mercantile pursuits, and the attendance of so large a number of the fair sex, who evinced the greatest interest in the proceedings, and it will be seen that the opening could not have taken place under more pleasing auspices. Whilst the city in general showed an extra amount of life and bustle, the interest naturally centered in the grounds of McGill University, which presented a bright and lively scene. In the reception room in the William Molson Hall there was a constant succession of visitors, and the various offices wore a busy air. In the grounds a new and picturesque effect was made by a couple of marquees wherein luncheon was served, and the grounds themselves, the grassy lawns and wooded walks, were the constant resort of ladies and gentlemen. The morning was spent by the visitors either in visits to the offices and reception rooms, the arrangement of papers, or in "doing" the city. At one o'clock the first work of the meeting commenced in the meeting of the general committee. Subsequently, at half past four, the visitors were formally welcomed by the mayor and corporation in the Queen's Hall, which was the scene of a brilliant gathering, and in the evening the first general meeting of the Association took place in the same hall, when the representative of the retiring president resigned the presidential office, which was assumed by the new president, Lord Rayleigh. Additional interest and distinction was given to the proceedings yesterday by the presence of His Excellency the Governor-General and the Marchioness of Lansdowns, and the Right Hon. Sir John A. Macdonald, Premier of the Dominion. Full reports of all the meetings and speeches together with other particulars of interest will be found subjoined. MEETING OF THE GENERAL COMMITTEE. A meeting of the general committee of the Association was held in the James Ferrier Hall, Wesleyan College, at one o'clock yesterday afternoon, Sir William Thomson presiding. The minutes of the meeting at Southport were read by the secretary, Rev. Prof. Bonney, and confirmed. THE REPORT OF THE COUNCIL.