CONTENTS 



Original Papers 



Page 



Geology. — Applied Geology. Alfred H. Brooks 19 



Geology. — Note on the stratigraphy of east-central Idaho. J. B. Umpleby. 49 

 Evolution. — Evolution in discontinuous systems. II. Alfred J. Lotka.... 49 



Proceedings 

 Biological Society 60 



Programs and Announcements 

 Biological Society 62 



