JANUARY 1908 No. 1 
Te 
i 
: — 
a 3 AC INST7g ye 
4 \ j Published by the University of a bfask 
a (x JUN 29 183 
; a 
AZ) 
TON ar Muse 
COMMITTEE OF PUBLICATION . 
SAMUEL AVERY W. K. JEWETT 
Cc. E. BESSEY A. S. JOHNSON 
F. M. FLING L. A. SHERMAN 
H. ALICE HOWELL Ww. G. L. TAYLOR 
T. L. BOLTON, Epiror 
“CONTENTS 
I On THE MAGNETIC SEPARATION OF THE LINES 
OF BARIUM, YTTRIUM, ZIRCONIUM, AND OSMIUM 
B.£E. Moore. : ; § 1 
II SprEcrric CHARACTERS IN THE BEE GENUS 
COLLETES 
Myron Harmon Swenk — d : 43 
LINCOLN NEBRASKA 
zie Entered at the post-office in I,incoln, Nebraska, as second-class matter, a as University~~’ 
: Bulletin, Series XIII, No. 16 
