RELIEF MAPS. 
361 
Ill compiling it, use lias been made of the memoranda and 
notes gathered by myself, supplemented by data contained 
in the printed catalogues of Ward’s Natural Science estab¬ 
lishment, of Rochester, N. Y., and of Mr. E. E. Howell, of 
Washington. In addition to these Mr. Howell and Mr. E. E. 
Court have kindly furnished additional notes and memo¬ 
randa, which have been used in preparing the table. 
From the short time available for its preparation the table 
is sure to contain errors, and, from the nature of the case, is 
incomplete. As, however, no such bringing together of this 
class of facts has been heretofore attempted, it is believed 
that even this incomplete list will not be without interest. 
