1921-22.] Concomitants of Quadratic Differential Forms. 
169 
(iv) From the coefficients of ^^4, d 
'{», * Si) *yys)* "(st * '^S) 
+ - Zj + + (/i + h-‘.h))t - 
i€:§)*^(S*sy<!yss’<S*4) 
* %, - i. t +<ii, +/, - kS 
“ + C4 ~ ”*3 + ”2)^ + + (/s + ~ It) = > 
0^ “Si 
S(jd d\f// 
da^ cl 
!) 
+ m[ + ?ii 
dh^ dm^J \5(/4 ^72j/ 
+ + (»4, + Z, - + («, + ^3 - < j 4 ! - 2»2| 
2„^?i + d,^^ + dS + {m, 
Bv -01 ^01 
'3+«2)(-c 
d(ji dlj/y 
= 0 . 
(v) From the coefficients of 
dh^ db^ dm^ 
-4g+c-2.4+C4-2g| 
« 3 |f + C 4 +^ 3 -«l)|^ + « 4 (|^ 
‘ax 
da 
d-jj dv/ 
= 0 , 
dh^ db^ df^ dm.2 
+ («2 - + {0,- Vz)% + {y - 2»^4)|| + ih - «h)^ 
- (*3 - 9. +/,)|^ - (A + »h - » 2 )|^ + ^' 4 (gf - - 
