Mr. Knight on the Expansion 
+ lo X O.Z + y + 0% * 2 !i}+ <t> (0{ y X 0^2 + l!o X o!l 
X i!, + X } + j'w (ik) X (si) . 
2 2 2 
19. Instead of leaving out of equation (ju,) the terms of this 
form / B 0 c r as we did in article 17, we might have omitted 
m, n^-r 
those of the form / B f ; in which case it would have 
become 
B = A* B 
TO,« TO, W — I 
C 
0,3 
rtu—r, n 
c 
1, 1 
+ 
TO— I, ?J— 3 
r B 
TO, «=~2 
C 
0,2 
B c 
/ 
Here., if we 
from 
for B its value 
m—fjL, n-=v 
, there results 
B 
TO-f I, K— I 
3, *==' I 
derived 
