Among other distinguished individuals who were efficient officers of these Abolition Societies, and delegates from their respective state societies, at the annual meetings of the American convention for promoting the abolition of slavery, were Hon. Uriah Tracy, United States' Senator, from Connecticut; Hon. Zephaniah Swift, Chief Justice of the same State; Hon. Cesar A. Rodney, Attorney General of the United States; Hon. James A. Bayard, United States' Senator, from Delaware; Governor Bloomfield, of New-Jersey; Hon. Wm. Rawle, the late venerable head of the Philadelphia bar; Dr. Caspar Wistar, of Philadelphia; Messrs. Foster and Tillinghast, of Rhode Island; Messrs. Ridgely, Buchanan, and Wilkinson, of Maryland; and Messrs. Pleasants, McLean, and Anthony, of Virginia. In July, 1787, the old Congress passed the celebrated ordinance abolishing slavery in the northwestern territory, and declaring that it should never thereafter exist there. This ordinance was passed while the convention that formed the United States' constitution was in session. At the first session of Congress under the constitution, this ordinance was ratified by a special act. Washington, fresh from the discussions of the convention, in which _more than forty days had been spent in adjusting the question of slavery, gave it his approval_. The act passed with only one dissenting voice, (that of Mr. Yates, of New York,) _the South equally with the North avowing the fitness and expediency of the measure on general considerations, and indicating thus early the line of national policy, to be pursued by the United States' Government on the subject of slavery_.