PROCEEDINGS 



OF THE 



American Philos6phical Society 



HELD AT PHILADELPHIA 



FOR PROMOTING USEFUL KNOWLEDGE 



Vol. XLIX. January-April, 1910. No. 194. 



CONTENTS. 



Photographic Observations of Daniel's Comet. By E. E. Barnard 3 



Notes on Some Pseudomorphs, Petrifactions and Alterations. By Austin 



F. Rogers 17 



Magic Observances in the Hindu Epic. By E. Washburn Hopkins 24 



Physical Notes on Meteor Crater, Arizona. By William Francis Magie 41 

 The Conversion of the Energy of Carbon into Electrical Energy on Solution 



in Iron. By Paul R. Heyl 49 



The Ether Drift. By Augustus Trowbridge 52 



Characteristics of the Inland-Ice of the Arctic Regions. By Wm. Herbert 



HoBBS 57 



Solar Activity and Terrestrial Magnetic Disturbances. By L. A. Bauer 130 



Minutes of Meetings from January 7 to May 20, 1910 i 



PHILADELPHIA 



THE AMERICAN PHILOSOPHICAL SOCIETY 



104 South Fifth Street 



1910 



