been made in pursuance of the authority given in his will to me, as his literary executor, acting in co-operation with his children, to publish or withhold from publication any of his unpublished pa pers. The portrait in the first volume was etched by Mr. Schoff from a photographic copy (kindly furnished by Mr. Alexander Ireland, of Manchester, England) of a daguerreotype taken in 1847 or 1848, probably in England. J. E. CABOT. NATURE CONTENTS. the Phi Beta Kappa Society, at Cambridge, Aug. 31, 1837 AN ADDRESS delivered before the Senior Class in Divinity College, Cambridge, July 15, 1838 LITERARY ETHICS. An Oration delivered before the Liter- ary Societies of Dartmouth College, July 24, 1838 . THE METHOD OF NATURE. An Oration delivered before 81 117 149 181 MAN THE REFORMER. A Lecture read before the Mechan- NATURE. A SUBTLE chain of countless rings |