120 
ME. W. SPOTTISWOODE ON THE CALCULUS OE SYMBOLS. 
(M + 2)(M + 1)M Y” (M + 2)(M + 1) y' 1 «VU -V 
-- 17273 J ~ 1.2 j + 
+ 
+ 
But the law of the expressions in the first form having been established above, it is 
unnecessary to pursue these latter formulae further. 
