430 

 _ Q 8 - yz) d x - (z* - xy) d<p _ xd x -yd<f> . 



Hence the element rf7jd£, under a double sign of integration, 



must be replaced by -^— dfydfo which is equal to ■- \ 



since 



x 2 - yz = x. 

 And as 



x 3 + y 3 + z 3 - 3 xyz = 1, 



1+^+^-3^=1 

 a; 3 



consequently 



This result is plainly analogous to the formula 



JrT^ = tan *» 



and might be expressed by putting 



JJ 1 + r, 3 



dy\dZ, . , „ 



7i3-^r tnt -w). 



The Rev. Orlando Dobbin read a paper on his collation of 

 the Codex Montfortianus. 



As it has been the controversy about the Three Heavenly 

 Witnesses which has given such notoriety to this particular 

 manuscript, Dr. Dobbin commenced his paper with an ac- 

 count of that celebrated passage of arms, in which as much 

 critical skill and polemic acerbity have been displayed, as in 

 any religious or literary controversy of any age. Expressing 

 his entire concurrence in the decision of such men as Porson, 

 Bishop Marsh, and Bishop Turton, on the spuriousness of the 



