CONTENTS 



Original Papers 



Pa* 

 Physics. — A note on electrical conduction in metals at low temperature. 

 F. B. Silsbeb 597 



Biology — Geochemical evidence as to early forms of life. F. W. Clarke . . 603 



Zoology. — Six new genera of unstalked crinoids belonging to the families 

 Thalassometridae and Charitometridae. Austin H. Clark 605 



Ethnology. — Some information from Spanish sources regarding the Siouan 

 tribes of the East. John R. Swanton 609 



Abstracts 



Electricity 613 



Geology 615 



Engineering 615 



References 



Astronomy 616 



Engineering 616 



