THE ASSOCIATION 



OF 



AMERICAN GEOLOGISTS AND NATURALISTS 



GRATEFULLY 



DEDICATES THIS VOLUME 

 TO THE 



HON. NATHAN APPLETON, 



OF BOSTON, 



TO WHOSE MUNIFICENCE AND ACTIVITY THE CULTIVATORS OF SCIENCE 

 ARE MAINLY INDEBTED 



FOR ITS rUBLICATION. 



^ 



