IV CONTENTS 



Page. 



Symposium on Food Problems in Relation to the War: 



I. Physiological Effects of a Prolonged Reduction in 

 Diet on Twenty-five Men. By Francis G. Bene- 

 dict 479 



II. Food Conservation from the Standpoint of the Chem- 

 istry of Nutrition. By H. C. Sherman 491 



III. Some Economic Aspects of the American Food Sup- 

 ply. By J. Russell Smith 501 



On the Number of Spiral Nebulae. By Heber D. Curtis .... 513 

 The Nayades (Freshwater Mussels) of the Upper Tennessee 

 Drainage. With Notes on Synonymy and Distribution. By 



A. E. Ortmann 521 



Brief Notes. By Benjamin Smith Lyman 627 



Soldiers' and Sailors' Insurance. By Samuel McCune Lind- 

 say 632 



A Brief History of the Study of Greek Vase Painting. By 



Stephen Bleeker Luce 649 



Obituary Notices of Members Deceased i 



Amos Peaslee Brown. By Witmer Stone in 



Minutes i 



Index xiv 



