57 



(i)'(i.y + (^-i,)'(^:-')'+(i^-)"(ir:2)Vetc. 

 (x-/(|)'-*-(ra)'(^^'/-*-(ir^/(T^V + etc. 



(i)=(|-)^ + (x^,)'(^'/-(x-:^s)'(N^)*-^''te- 

 (i)'(^)'-^-(,-^i)'(^^)'-^(xi^)'(^^*-^-etc. 



CXCt £tCo 



(t)' 



(t)' 

 (t)' 

 (t)' 



A'oia yl8a Acad. Tmp. Scimt. Tom. Xll. 



H 



SPE- 



