^^if 



PROCEEDINGS 



OF THE 



American Philosophical Society 



HELD AT PHILADELPHIA 



FOR PROMOTING USEFUL KNOWLEDGE 



Vol. LIX. 



1920. 



No. 4. 



CONTENTS 



The High Voltage Carona in Air. By J. B. Whitehead _ _ - 



A New Theory of Polynesian Origins. By Roland B. Dixon - 



Correlation of Shape and Station in Fresh-water Mussels (Naiades). 

 By A. E. Ortmann -------------- 



The Distribution of Land and Water on the Earth. By Harry Field- 

 ing Reid ---------------- 



PAGE 



3^5 



PHILADELPHIA 



THE AMERICAN PHILOSOPHICAL SOCIETY 



104 South Fifth Street 



1920 



