312 American Association for the Advancement of Science. 



Tuesday, Aug. 14. 



1. On the Aurora Borealis, by Prof. Secchi of Georgetown, D. C. 



2. On the Polar Plant, by Maj. B. Alvord, U. S. A. 



3. On the Plants of Wisconsin, by J. A. Lapham, Esq., of Mil- 



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waukie. 



ville. 



*r 



5. A plan for the Diffusion of Human Knowledge. 

 Correspondence in relation to the Altona Observatory. 

 Structure of Coral Animals, by Prof. Louis Agassiz. 



6. On the Fossil genus Mosasaurus and new allied genera in the 

 United States, by R. W. Gibbes, M.D. 



Wednesday, Aug. 15. General Session, 10 A.M. 



1. On an American Prime Vertical, by Lieut. Charles H. Davis. 

 After the reading of this paper, the members met in two sections, 



when the following papers were presented, 



SECTION OF GENERAL PHYSICS. 



2. On the Natural Classification of Curves, by Rev. Thomas Hill. 



3. On Planetary Perturbations, by Prof. Benjamin Peirce. 



4. On a Comparison of the Results derived in Geodesy from the 

 method of least squares, by Prof. A. D. Rache. 



5. On Boltonite, by William Seamann, Esq., M.D. 



6. On Boltonite, and on Thompson's Bi-silicate of Magnesia, by 

 Prof. Benjamin Silliman, Jr. 



7. On the Moisture, Ammonia and Organic Matter of the Atmos- 

 phere, by Prof. E. N. Horsford. 



SECTION OF NATURAL HISTORY. 



1. On the Zoological Character of Young Mammalia, by Prof. Louis 

 Agassiz. 



2. On the Vegetable Character of Xanthidium of Ehrenberg, by 

 Prof. Louis Agassiz. 



3. On Valerianate of Morphine, a new medicine, by Dr. Morrill 

 Wyman and Prof. E. N. Horsford. 



4. On Footmarks in the Red Sandstone, by I. Lea, Esq. 



5. On Volcanos not Safety Valves, by James D. Dana, Esq. 



6. On ihe Remains of a Fossil Elephant, found in Vermont, by 

 Prof. Louis Agassiz. 



7. On the Existence of Remains of Mastodon angustidens in the 

 United States, by Dr. J. C. Warren. 



Thursday, Aug. 16. 

 section of general physics, chemisty, etc 



1. On the Relation between the Elastic Curve and the Motion of the 

 Pendulum, by Prof. B. Peirce 



2. On the Second Recorded Comet of 1784, commonly called Comet 

 of D'Angas, by Dr. B. A. Gould, Jr. 



3. Remarks on Terrestrial Thermoties, by Lieut. E. B. Hunt, 

 U. S. E. 



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