314 
May 26, 1873. - 
The VICE-PRESIDENT (PROFESSOR CAYLEY) in the Chair. 
On curves of the fourth degree. By F. W. Newman 
(communicated by Mr J. Srvarr), — 
The curves spoken of in this communication were classified 
according to their symmetry and the number of their axes. 
Prof. CAYLEY said that he considered that the best method 
of classifymg quartic curves was according to the quartic cones 
of which they were sections. Quartie cones might be divided 
into singular and non-singular forms; and non-singular forms 
might be considered to belong to the same species if they could 
be transformed continuously into one another without passing 
through a singular form. 
