CONTENTS 



Original Papers 



, Pnge 



Physics. — The diffuse reflecting power of various substances. W.W.Coblentz 447 

 Electrochemistry. — The silver voltameter. I. E. B. Rosa and G. W. Vinal 451 

 Zoology. — The occurrence of nodes in the bathymetrical distribution of the 



recent crinoids. Austin H. Clark 456 



Botany.- — Papualthia Mariannae, a new species of Annonaceae from the Is- 

 land of Guam. William Edwin Saff ord 459 



Abstracts 

 Chemistry 484 



References 

 Agriculture 466 



Proceedings 



The Botanical Society of Washington 468 



The Anthropological Society of Washington 469 



