A discourse concerning the conversion of the heathen Americans : and the final propagation of Christianity and the sciences to the ends of the earth. In two parts. Part I. Preached before a voluntary convention of the Episcopal clergy of Pennsylvania, and places adjacent, at Philadelphia, May 2d, 1760; and published at their joint request. Part II. Preached before the trustees, masters and scholars of the College and Academy of Philadelphia, at the first anniversary commencement. By William Smith, D.D. provost of the said college and academy.