CONTENTS 



Original Papers 



Physics. — The constants of the quartz-wedge saccharimeter and the 

 specific rotation of sucrose. Part I: The constants for the 26 gram 

 normal weight. Frederick Bates and Richard F. Jackson 25 



Geology.— Subdivisions of the Thaynes limestone and Nugget sandstone, 

 Mesozoic, in the Fort Hall Indian Reservation, Idaho. G. R. Mansfield 31 



Botany.— The systematic position of the "rain tree," Pithecolobium Saman. 

 E. D. Merrill 42 



' Abstracts 



Geophysics 49 



Zoology ' ; 50 



% Proceedings 

 The Philosophical Society 51 



