The First Natiotial Scientific Congi-css. 473 



nivsics. 



Prof. Benjamin Hallowell of Maryland. On the Liberation of Caloric 

 in some Chemical Chanti:es that are Attended with an Enlargement of 

 Bnlk. 



Capt. Alfred Mordecai, U. S. A. Notice of a Ballistic Pendnlum, con- 

 structed at Washington Arsenal for Experiments in Gunnery. 



John Tyler, jr., of Washington. In Support of the Theory of our 

 Electric Fluid. 



MKTKOROLOGV. 



Prof. Michael Jacobs of Pennsylvania. On the Indian vSummer. 



Prof. James Pollard Espy of Washington. On Meteorology. 



Prof. James Hamilton of the University of Nashville. On certain 

 Meteorological Facts Observed at Nashville. 



Lieut. Matthew Fontaine Maury. U. S. N. On the Gulf Stream. 



George Baker and Isaac Thurber of Providence. On the Tides of 

 Providence River and Narragansett Bay. 



Prof. Robert Hare of the Universit}' of Pennsylvania. A call for Obser- 

 vations of the Lake Storm. 



Prof. Alexander Dallas Bache, LL. D. An abstract of Maguetical and 

 Meteorological Observations made under the direction of the War Depart- 

 ment, at the Observatory, Girard College, Philadelphia. 



GEOLOGY. 



Prof. William Williams Mather of Ohio Universit3\ On the Physical 

 Geology of the United States. 



Rev. Eliphalet Nott, D. D., LL. D., president of Union College. On 

 the Origin, Duration and End of the World. 



Prof. John Holmes Agnew of New York. On the Glacier System or 

 Ice Period of Agassiz. 



Prof. John Locke of the Medical College of Ohio, Cincinnati. On 

 Lake Superior, embracing an account of Miscellaneous Observations on 

 the Geology, Mineralogy, Topography, Scenery, Climate, Meteorology, 

 etc. , of the Lake. 



PALKONTOLOGY. 



William Ballantyne Hodgson, of vSavainiah, Georgia. On the Mega- 

 theroid Fossils of the Atlantic Coast of Georgia. 



Aaron D. Chaloner, M. D., of Philadelphia. A Petrified Forest near 

 Cairo, Egypt. 



ZOOLOGY. 



Rev. John Gottlieb Morris, D. D. , of Baltimore. On the Past and 

 Present State of Entomology in the United States. 



Prof. Jacob Whitman Bailey, United States Military Academy. Notes 

 on American Polythalamia. 



