CONTENTS 



Page 



A Possible Explanation of Upper Eocene Climates. By Ed- 

 ward W. Berry i 



The Earth Inductor Compass. By Paul R. Heyl and Lyman 

 J. Briggs 15 



The Probable Action of Lipoids in Growth. By D. T. Mac- 

 DouGAL 33 



The Small Entelodonts of the White River Oligocene. By 

 William J. Sinclair 53 



Hyracodons from the Big Badlands of South Dakota. By Wil- 

 liam J. Sinclair 65 



The Use of Devices for Indicating Vowel Length in Latin. By 

 John C. Rolfe 80 



Some Peculiarities of the Novae. By E. E. Barnard 99 



The Relations of the Retinal Image to Animal Reactions. By 

 G. H. Parker 107 



Some Typographic and Climatic Characters in the Annual Rings 

 of the Yellow Pines and Sequoias of the Southwest. By 

 A. E. Douglass 117 



The Effect of Diurnal Variation of Clock Rates upon Longitude 

 Work. By R. H. Tucker 123 



Ecologic and Morphologic Study of the Clovers (Trifolium). 

 By John W. Harshberger 136 



The Fserce Language. By J. Dyneley Prince 151 



Minutes i 



Discussion of a Kinetic Theory of Gravitation, II ; and Some 

 New Experiments in Gravitation. By Charles F. Brush. . 167 



Lithology of the White River Sediments. By Harold F. Wan- 

 lass 184 



Yellow Fever and Fishes. By C. H. Eigenmann 204 



Arc Spectra and Ionization Potentials in Dissociated Gases. By 

 K. T. CoMPTON 212 



Manna, Nectar, and Ambrosia. By Paul Haupt 227 



iii 



