( 



WfcS.. 

 #"''&■ " 





ERRATA. 



, . ml xrTT fA.B,BC, &O (AB r BC,&c. 



In Theorem 7, page 41, and in Theorem VII., J g 1 ^ Q A> &c l r<?ad J B C ^ c A, &c. 



page 44, for (CjA, AB,&c. J (CA^AB, &c. 



In Theorem LXXII. page 52, the sentence ought to end at the comma ; the rest 

 is obviously erroneous. 



