84 



Vol,. III. 



October, 1908 



No. 4 



University S 



Pubhshed by the University/of Nebraska 



JUn2 9 1934 



COMMITTEE OF PUBLIC! 



L. A. SHERMAN C. E. BESSEY 



H. B. WARD W. G. L. TAYLOR H. H. NICHOLSON 

 T. L. BOLTON R. E. MORITZ 



F. M. FLING, Editor 



CONTENTS 



I. Regeneration in Hydromedusae 

 George Thovtas Ha7'gitt 



II. Some Peculiar Double Salts op Lead 

 John White ..... 



III. The Memoires de Bailly 

 Fred Morrow Fling 



275 



307 



331 



IV. On the Representation of Numbers as Quo- 

 tients OF Sums and Differences of Perfect 

 Squares 



Robert E. Moritz 355 



LINCOLN, NEBRASKA 



Entered at the post-office in I<incoln, Nebraska, as second-class matter, as University 

 Bulletin, Series 8, No. 13 



