CONTENTS 



Original Papers 



Pac* 



Mathematics. — Note on relativity: The geometric potential. Edwin Bid- 

 well Wilson 665 



Mineralogy. — Lorettoite, a new mineral. Roger C. Wells and Esper S. 

 Larsen 669 



Soil Chemistry. — A chemical study of the habitat of the walking fern, Camp- 

 tosorus rhizophyllus (L.) Link. Edgar T. Wherrt 672 



Abstracts 



Metallurgy 680 



Geology 681 



Botany 682 



Proceedings 

 The Botanical Society 683 



