Two sermons, delivered before the New-York Missionary Society : the first on April 23d. in the Scots Presbyterian Church, by the Rev. Dr. Livingston. : The second on April 24th, in the North Dutch Church, by the Rev. Dr. M'Knight. : To which is added, a charge given to the first missionary, by the Rev. Dr. Rodgers; together with the instructions to missionaries, and the report of the directors.