314 Prof. Cayleyora Equal Roots of a Binary Quartic. [Feb. 25, 



V. Note by Professor Cayley on his Memoir "On the Conditions 

 for the Existence of Three Equal Roots, or of Two Pairs of Equal 

 Roots, of a Binary Quartic or Quintic." Received February 20, 

 1869. ' 



The title is a misnomer ; I have in fact," in regard to the quintic, consi- 

 dered not (as according to the title and introductory paragraph I should 

 have done) the twofold relations belonging to the root-systems 31 1 and 221 

 respectively, but the threefold relations belonging to the root-systems 41 

 and 32 respectively. The word "quadric," p. 582, line 1, should be read 

 " cubic." The proper title is, " On the Conditions for the Existence of 

 certain Systems of Equal Roots of a Binary Quartic or Quintic." 



March 4, 1869. 



Lieut. -General SABINE, President, in the Chair. 



In accordance with the Statutes, the names of the Candidates for elec- 

 tion into the Society were read as follows : — 



Sir Samuel White Baker, M.A. 

 William Baker, C.E. 

 John J. Bigsby, M.D. 

 Francis T. Buckland, M.A. 

 George William Callender, F.R.C.S. 

 Charles Chambers. 

 Walter Dickson, M.D. 

 Henry Dircks. 



Sir George Floyd Duckett, Bart. 

 William Esson, M.A. 

 Alexander Fleming, M.D. 

 Prof. George Carey Foster, B.A. 

 Peter Le Neve Foster, M.A. 

 William Froude, M.A., C.E. 

 Edward Headlam Greenhow, M.D. 

 William Withey Gull, M.D. 

 G. B. Halford,'M.D. 

 Townshend Monckton Hall. 

 Edmund Thomas Higgins, M.R.C.S. 

 Charles Home. 

 James Jago, M.D. 

 George Johnson. M.D. 

 J. Norman Lockver. 

 James Atkinson Longridge, C.E. 



John Robinson M'Clean, C.E. 



George Matthey. 



St. George Mivart. 



Prof. Alfred Newton, M.A. 



Captain Sherard Osborn, R.N., C.B. 



Oliver Pemberton. 



Charles Bland Radcliffe, M.D. 



William Henry Ransom, M.D. 

 I Theophilus Redwood, Ph.D. 



John Russell Reynolds, M.D. 

 I Yice-Admiral Sir Robert Spencer Ro- 

 biuson, K.C.B. 



Major James Francis Tennant, R.E. 



Edward Thomas. 

 | Prof. Wyville Thomson, LL.D. 



Cel. Henry Edward Landor Thuiilier, 

 B.A. 



Cromwell Fleetwood Yarley, C.E. 

 Augustus Yoelcker, Ph.D. 

 Edward Walker, M.A. 

 George Charles Wallich, M.D. 

 Henrv Wilde. 

 Samuel Wilks, M.D. 



