wz 





Vol. IV 



April 1904 



No. 2 



";, 



i 



University Studies 



Published by the University o/J^^^i^ljf^j^^ 



((iSr JU'M 2 3 1834 



COMMITTEE OF PUBLICATION 



C. E. BESSEY T.^K^^^Ctttjyvg^/ 



D. B. BRACE F. M. FLING R. S. LILLIE R. E. MORITZ 



W. G. L. TAYLOR J. I. WYER 



L. A. SHERMAN, Editor 



CONTENTS 



I On the; Determination of the Refractive 

 Indices by Means of Channeled Spectra 



S. R. Williams 129 



II On the Effect of a Magnetic Field on the 

 Interference of Natural Light 



John Mills 145 



III Some Hypermetamorphic Beetles and their 

 Hymenopterous Hosts 



W. Dwight Pierce 153 



LINCOLN NEBRASKA 



Entered at the post-office in Lincoln, Nebraska, as second-class matter, as University 

 Bulletin, Series 9, No. 10 



