CONTENTS 



Obiqinal Papebs 



Pa<e 



Physics. — The accurate measurement of the refractive indices of minute 



crystal grains under the petrographic microscope'. Fred. E. Wright. . 101 

 Geology. — An estimate of the age of the last great glaciation in Alaska. 



Stephen R. Capps 108 



Botany. — A new genus of palms allied to Archontophoenix. 0. F. Cook. 116 



Bacteriology. — Bacillus abortus in market milk. Alice C. Evans 122 



Zoology. — On certain aspects of the bathymetrical distribution of the re- 

 cent crinoids. Austin H. Clark 125 



Proceedings 



Philosophical Society 135 



Geological Society 139 



Anthropological Society 142 



