18 



to the east end of Long Island, and this ap- 

 pendix is remarkable as containing the first 

 attempt at a systematic arrangement of the 

 organic relics of the United States. 



An Index to the Geology of the United States, 

 by Amos Eaton, appeared in 1818. This 

 was prepared as a text book for the pupils 

 of the author, and is accompanied by a geo- 

 logical section extending from the Kaatskill 

 mountains to Boston, or through five de- 

 grees of longitude. It is valuable as con- 

 taining the first attempt at a general ar- 

 rangement of the geological strata in North 

 America. Three parallel sections, at the dis- 

 tance of fifty miles on each side, were care- 

 fully examined, in order to confirm his geo- 

 logical profile. It is no small praise of this 

 work, and at the same time exhibits a grati- 

 fying proof of the interest taken in this sci- 

 ence, when we state that a second edition 

 was required and published in 1820, and 

 formally recommended by the Troy Lyceum 

 of Natural History, as an authentic record 

 of geological facts. The section of strata is 

 again given with many corrections and ad- 

 ditions, and is extended to the Susquehan- 

 na, comprising nearly five degrees of longi- 



