286 



PROFESSOK A. G. (JREENHILL ON THE 



_ 



s .- 



6)* 



2C = 



a (I- 6 2 ) (a? + 



{3 2 + a 8 4- (1 

 (l-a) 3 & 2 



- a) 3 fe* (a - 



3a) 



C, 2 



1 



o _ , 2 



_. it G 



C 



. 



4 (a m) 8 



4 (1 2m) a 8a 2 



j 'r 



4a (a m) 



4a 



(a- - 



h 



Haft (a 3 + //-) 2ab (l - a) (n 2 + /r) 



(1 + 3a) fe 2 } 







i/ o) o = i^= 



'^ !) + (a 4 - a 5 ) &*_(! + 3a) 6 s - 8a s 6 s (a 3 - 



1 /I , O v: __ a a - - 



3a" + a" + 6 (a* - a 5 ) 



Thus m the quadric transformation 



2 (a 3 

 (l + 3a) 6 s - 8a 3 6 2 (a 3 



-- - - 



D = (a* - 7' 4 ) 3 {(3a 2 + a 3 ) 2 - (1 + 3a)- 6*} 

 involving powers of b* only ; this will be useful in the sequel. 



( } 



, 



, } 



, 

 *) ( 



//) . . 

 + 



(35), 



(36), 

 (37), 



