234 Prof. Silliman’s Address before the 
Albany, made an elaborate survey of the geology of the country 
on the Erie canal. Prof. Hitchcock described the valley of the 
Connecticut; Prof. Dewey the western part of Massachusetts, 
the memoirs of both being illustrated by geological maps and 
sections. Mr. James Pierce described parts of New Jersey, the 
Cattskill mountains, Maine and Florida, &c.&c. The Academy 
of Natural Sciences in Philadelphia, the New York Lyceum 
of Natural History, and the Albany Institute, formed valuable — 
collections and published important memoirs; the American 
Journal of Science and the Boston Journal of Philosophy by 
Dr. Webster, recorded many of the geological observations of the 
day, either in the form of original papers or copied from the ar- 
chives or publications of learned societies. In the American 
Journal of Science alone there are about four hundred memoirs 
and communications on geology and mineralogy ; most of them 
are original papers and by far the greater part are accounts of 
American researches made in illustration of the mineralogy and 
geology of the United States, Canada and Nova Scotia. In Can- 
ada many British officers were very active and successful explo- 
rers in geology. Dr. Charles T. Jackson and Mr. Francis Alger 
of Boston, in 1828 and 1829, published in the American Journal 
of Science a full and able account of the mineralogy and geology 
of Nova Scotia, with a map and pictorial illustrations. In 1831, 
this memoir much enlarged and improved by a second visit to 
Nova Scotia appeared in the Transactions of the American Acad- 
emy at Boston. 
In the above enumeration, we have not included hundreds of 
miscellaneous notices, besides numerous communications pub- 
lished in the journals and transactions of our academies, @ ad 
various journals more or less scientific. Nor do we include many 
reports on geology and mineralogy made to the general goverl- 
ment by their authorized scientific travellers, such as the journals 
of Lewis and Clark, Mr. Schoolcraft and Major Long; nor ge 
logical works relating to foreign countries although written here 
—as, for instance, the excellent account of the Azores or Western 
Islands, by Prof. J. W. Webster of Harvard University, who was 
one of our early and active geological explorers. 
__ Itis sufficiently apparent, that since the commencement of this 
century, and particularly within the last twenty-five or thirty 
years, geology has become in this country a favorite pursuit, n° 
