1858-64.] EXCURSION INTO MAINE. 143 



what are called "horse-backs." His Alpine experiences 

 of twenty and more years before came vividly before 

 him, when in presence of the morainic material accumu- 

 lated all over the state of Maine, and after returning 

 home he dictated one of the best articles he contributed 

 to the "Atlantic Monthly," under the title, "Glacial 

 Phenomena in Maine." 



