TABLE OF CONTENTS. 



PROCEEDINGS OF THE ASSOCIATION; 



First Session, 1840. 9 



Second Session, 1841 11 



Third Session, 1842 42 



CONSTITUTION AND BY-LAWS 77 



NAMES OF THOSE WHO HAVE BEEN PRESENT AT THE MEET- 

 INGS, OR WHO HAVE MADE COMMUNICATIONS. . . 78 



TRANSACTIONS OF THE ASSOCIATION 81 



Notice of a Model of the Western portion of the Schuylkill Coal 

 Field of Pennsylvania, in illustration of an Address to the Associa- 

 tion, on the most appropriate Modes for representing Geological 

 Phenomena. By Richard C. Taylor, of Philadelphia, . . 81 



^ Observations on the Secondary and Tertiar)^ Formations of the 

 Southern Atlantic States. By James T. Hodge : with an Appendix, 

 hy T. A. Conrad 94 f^- 



A Sketch of the Infusoria, of the Family Bacillaria, with some 

 Account of the most interesting Species which have been found in a 

 recent or fossil state in the United States. By J. W. Bailey, 

 Prof, of Chem. and Geolog}-, U. S. Military Academy, West Point. 112 



The Phenomena of Drift, or Glacio-aqueous action in North 

 America, between the tertiary and alluvial Periods. By Edward 

 Hitchcock, LL. D., Prof, of Chemistry and Natural History in 

 Amherst College, Mass. 164 



On a neAV Species of Trilobite, of very large size. By John Locke, 

 Prof. Chem. and Pharmacy in the Medical College of Ohio. . .221 



On the Origin of Mineral Springs. By Lardner Vanuxem, of 

 Bristol, Pa 224 



Ancient Earthworks of Ohio. By Prof. John Locke. . . 229 



A new reflecting Level and Goniometer. By Prof. John Locke. 238 



Notice of a prostrate Forest under the Diluvium of Ohio. By 

 Prof. John Locke. 240 



On some Pseudomorphous Minerals of the State of New York. 

 By Lewis C. Beck, M. D., Prof. Chemistry and Nat. History in 

 Rutgers College, New Jersey .241 



