I DEDICATE THIS VOLUME 



TO THE MEMORY OF 



FEANCIS ADAMS, A.M. M.D. LL.D. 



AS A 



SMALL TOKEN OF FILIAL DEVOTION, 



AND IN GRATEFUL REMfcMBRANGE OF THAT TRAINING 



IN EARLY LIFE 



BY WHICH HE DIRECTED MY MIND 



TO AN APPRECIATION OF THE WORKS OF NATURE, 



AND A LOVE FOE ALL INTELLECTUAL 



AND IMPROVING STUDIES. 



