TJic First Na lion a I Scientific Congress. 473 



PIIYvSICS. 



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

 in some Chemical Changes that are Attended with an Enlargement of 

 Bulk. 



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

 structed at Washington Arsenal for Experiments in Gunnery. 



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

 Electric Fluid. 



METEOROI.OGY. 



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



Prof. James Pollard Espy of W^ashington. 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 University of Pennsylvania. A call for Obser- 

 vations of the L,ake Storm. 



Prof. Alexander Dallas Bache, LL. D. An abstract of Magnetical 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 University. On the Phj^sical 

 Geology of the United States. 



Rev. Eliphalet Nott, D. D., EL. 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. 



PAIvEONTOLOGY. 



William Ballantyne Hodgson, of Savannah, 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. 



