Mvi 



Vol. XXI ^ ^nuary-OctobeS^ 19^ 



Nos. 1-4 



University studies 



Published by the University of Nebraska 



COMMITTEE OF PUBLICATION 



F. M. FLING 

 P. H. FRYE 

 HUTTON WEBSTER 



P. H. GRUMMANN 

 L. A. SHERMAN 

 M. G. WYER 



CONTENTS 



An Experimental Study of the Cathode Fall in 

 Helium and Argon with Wire Cathodes. L. G. 

 Raub I 



The Diatoms (Bacillarioideae) of Nebraska. C. 

 J. Elmore 22 



LINCOLN, NEBRASKA 



