THE APRIL MEETING, 1844. 431 



On the Megatherioid Fossils of the Atlantic Coast of Georgia. — Wil- 

 liam B. Hodgson, of Savannah, Georgia. 



On Domestic Exchanges in Natural History and Geology. — Pro- 

 fessor E. Foreman, of Baltimore. (Read by Dr. Morris.) 



Noticeof a Ballistic Pendulum constructed at Washinoton Arsenal, 

 for Experiments in Gunnery. — Capi. A. Mordecai, U. S. Army. 



Exercises of the Fourth Meeting, Wednesday Evening, April 3. 



Hon. John C. Spencer in the chair. 

 On the Condition of Science in the United States and Europe. — A. 



D. Bache, L. L. D., Superintendent of the United States Coast 



Survey. 

 On the Indian Summer. — Professor M. Jacobs, of Pennsylvania. 

 Petrified Forest near Cairo, Egypt, discovered by Mens. Linant. — 



A. D. Chaloner, M. D., of Philadelphia. 



Exercises of the Fifth Meeting, Thursday Morning, April 4. 

 Hon. Robert J. Walker in the chair. 

 Prayer, by the Rev. Dr. Laurie. 

 On an Improved Method of Teaching the Natural Sciences. — Peter 



A. Browne, L. L. D., of Philadelphia. 

 On the Physical Geology of the United States. — Professor W. W. 



Mather, of Ohio. 

 On the Improvement of Mathematical Science and the Consequent 

 Advancement of the Natural Sciences. — Professor C. Gill, of 

 New York. 



Exercises of the Sixth Meeting, Thursday Evening, April 4. 



Hon. John C. Spencer in the chair. 



On the Origin, Duration, and End of the World. — Rev. E. Nott, 



D. D., L. L. D., President of Union College. 

 On the Glacier System, or Ice-period of Agassiz. — Professor J. H. 



Agnew, of Netv York. 



