126 
GEOLOGV 
on the Geology of the United States of North America; with remarks on the pro- 
bable effects that may be produced by the decomposition of the different classes of 
rocks on the nature and fertility of soils : applied to the different States of the 
Union, agreably to the accompanying Geological Map. With two copper plates; 
(Trans, of the Amer. Phil. soc. ; vol. 1, new series, 1818); Philadelphia. A 
corrected reprint of this last edition was made in Philadelphia, 1817, in 8®. 
form. 
1816 — CIGSVGIrIKI^ P. — An Elementary treatise on Mineralogy and Geology; 8®. Boston. Second edition, 2 
vol. 1822. 
1818 — Eaton, Amos. — Index to the Geology of the Northern Slates; 12". Leicester: second edition, 1820. Troy. 
1819 — RRfillGSqUG ^ G. S. ~ Travels and discoveries in the West; 8", Pittsburgh. 
1820 — HRydcn^ H, H. — Geological essays -, or an inquiry into some of the geological phenomena to be found in 
various parts of America, and elsewhere; 8". Baltimore. 
1821 •— Nultall , Thomas — Observations on the Geological structure of the valley of the Mississippi (Extract from 
the Journal of the Academy of Natural sciences of Philadelphia ; vol. II, Part. I, 
pag. 14). 8". Philadelphia. 
1822 — Struve , Baron von — Beitrdge ztir Mineralogie und Geologic des nordlichen Amerika's ; 12". Hamburg. 
1823 — Humboldt, Alexandre de — Essai ge'ognoslique sur le gisement des roches dans les deux he'misphires ; 8". 
Paris. 
1825 — Van Rensselaer, j. — Lectures on Geology; delivered in the New York Athenajum ; 8". New York. 
1828 — Eaton, Amos — A geological nomenclature for North America; 8". Albany. 
1828 — Vanuxem, l., and Morton, s. G. — Observations on the Geology and organic remains of the Se- 
condary, Tertiary, and Alluvial formations of the Atlantic coast of the United 
Stales of North America (Extract from the sixth vol. of the Journ. of the Acad, 
of Nat. sci. of Philadelphia); 8". Philadelphia. 
1829 — feilliman^ B. Sr. — Outline of a course of Lectures on Geology at Yale College. 8". New Haven. 
1831 — ltRfiuGS(][UG ^ C. S. — Enumeration and account of some remarkable natural objects , etc.; 8". Philadelphia. 
1832 — Coiircld^ T. A. — Fossil shells of the Tertiary formations of North America; 8". Philadelphia. 
1832 — Eaton, Amos. - Geological Text Book, for aiding the study of North American Geology. 8"; second edition. 
Albany. First edition, 1830; Albany. 
1833 Green, j. — Monograph of the Trilobiles of North America; 8". New York. 
1833 — LgR^ Isaac. — Contributions to Geology; 8". Philadelphia. 
1833 — J. ~ Travels in the United States of America and Canada, with notices of their Geology and Mine- 
ralogy; 8". London. 
1834 — Morton 5 S. G. — Synopsis of the organic remains of the Cretaceous group of the United Slates. To which 
is added an appendix , containing a tabular view of the Tertiary fossils hitherto 
discovered in North America; 8°. Philadelphia. 
