662 
ME. A. CAYLEY ON THE ANALYTICAL THEOEY OE THE CONIC. 
where 
= -{A, B, C, F, G, HXr, 
<p= r, p?', r 
I', «, h, g 
r!. h, h, f 
r. g-> / c 
^ , d<t , d(p , d<p . , 
bo that ^ i ^ 7 , 4 are respectively 
=-(Ar+H;j'+Gr), -(Hr+B;?'+Fr)-Gr+iv+cr, 
and where I, m. n are supernumerary arbitrary quantities. 
