PROCEEDINGS 



OF THE 



American Philosophical Society 



HELD AT PHILADELPHIA 



FOR PROMOTING USEFUL KNOWLEDGE 

 Vol. LVII. 1918. No. 1. 



CONTENTS 



Interrelations of the Fossil Fuels, in. By John J. Stevenson . . . i 



The Archaeological Significance of an Ancient Dune. By Charles C. 

 Abbott 49 



American Sanitation in the Philippines and its Influence on the Orient. 

 By Victor G. Heiser 60 



PHILADELPHIA 



THE AMERICAN PHILOSOPHICAL SOCIETY 



104 South Fifth Street 

 191S 



