1904.] MINUTES. 99 



"The Silurian Fauna of Arkansas," by Mr. Gill^c^rt 

 van Ingen. Introduced by Prof. W. B. Scott. 



"Palladium/' by Mr. Joseph Wharton, of Philadelphia. 

 Discussed by Mr. Willcox and Prof. Baskerville. 



Evening Session, 8 P.M. 



[ (At the Free Museum of Science and Art, University of Pennsylvania.) 



President Smith in the Chair. 



The following paper was read : 



" Pompeii and Saint Pierre : An Examination of the Plinian 

 Narration, and Other Studies" (with lantern shde illustra- 

 tions), by Prof. Angelo Heilprin, of Philadelphia. 



Friday, April 8. — Morning Session, 10 A.M. 

 Vice-President Barker in the Chair. 



The following papers were read : 



"The Reflex Zenith Tube/' by Prof. Charles L. Doolittle, 

 of Philadelphia. Discussed by Prof. Snyder and Dr, 

 Brashear. 



"Faint Double Stars," by Mr. Eric Doolittle, of Philadel- 

 phia. 



"On the Spectra and General Nature of Temporary Stars," 

 by Prof. William W. Campbell, of Mt. Hamilton, Cal. Dis- 

 cussed by Dr. Brashear and Dr. Barker. 



"Systems of n Periplegmatic Orbits," by Prof. Edgar Odell 

 Lovett, of Princeton. Introduced by Prof. C. L. Doolittle. 



"Radium from American Ores," by Prof. A. H. Phillips, 

 of Princeton, N. J. Discussed by Mr. Joseph Wharton and 

 Profs. Barker and Phillips. 



