) 
Association of American Geologists and Naturalists. 231 
Cleaveland on fossil shells, 1808. J. F. and S. L. Dana on the. 
mineralogy and geology of Boston and its vicinity, 1818. Jackson 
and Alger on the mineralogy and geology of Nova Scotia, 1831. 
There are numerous geological notices in our medical journals, 
especially in the Medical Repository of Mitchill and Miller, of 
New York ; in the Proceedings of the Geological Society of Penn- 
sylvania; in the Physical Researches of Dr. Harlan; the Contri- 
butions of Mr. Lea; the works of Vanuxem and Morton, espe- 
cially in the distinct volume of the latter upon the chalk formation ; 
and doubtless in many other works which we cannot recollect or 
need not enumerate. 
Resuming my personal narrative, I returned to America in 
June, 1806, and being anxious to compare the region of New 
Haven with that of Edinburgh, I eagerly reviewed my own im- 
mediate district. It isa fine region of trap rocks, with sand- 
stones, through which the traps rise in bold ridges and peaks, 
while in close proximity, are immense ranges of primary rocks, 
amorphous and slaty. Of this region, on an area described by a 
radius of five or six miles, I made a geological survey and a re- 
port,* the imperfections of which may claim the more indulgence, 
as it was, I believe, the earliest attempt, but one, of the kind in the 
United States. In the year 1799, a very brief mention is made 
by Thomas P. Smith, in the Transactions of the Philosophical 
Society of Philadelphia, (old series, Vol. 4, p. 445,) of some col- 
umns of basalt in Pennsylvania, and in the year following my 
report in the same records. M. Godon, a French geologist then 
in this country, presented some minutes. towards a. i 
map of a part of Delaware, which I believe was-never finished. 
In 1807, the year after my return, Mr. William Maclure passed 
several days in examining the geology of the immediate vicinity 
of New Haven, and I enjoyed the advantage of being with him 
on that occasion. He was then engaged in that extensive tour 
of observation which eventually covered the United States, Can- 
ada, and the West Indies. Of these labors he communicated an 
account to the Philosophical Society of Philadelphia in 1809, 
* ‘To the Connecticut Academy of Arts and Sciences. 
+ At the meeting of the Association in Boston, Dr. Dana read the title of what 
was the first geological report made on American geology, viz. Bey- 
trage zur mineralogepfer Keintre und des Céstlicheu theils von Nord America und 
‘sum Gebarsge von D. Johamre David Schépf.” test 
