( 106 ) 
In this way we obtain for the first denominator the following 
reduction : 
ag bg ay by dg bg ay by ay by 
dg by ag bg az by ae X7 glag bs ag bs = k X7,9\a9 by ag bg 
(410 bio ag by ag bg | azo bio ay bo 410 Dio ag by 
Gio O19 Ag bp Gio bio aio bio 
jo Dio 
ay by 
+- k X70 ag bs ay by == ke { X78 Xg9 X9,10 = X78 X*s 10 Le 
+ 2X78 Xoro X7,10 — X*7,9 Koo + Kro Krio X810 — Krol = 
X78 X7,9 X7,10 
X78 X70 
= k®|X79 X70 Xero) + k° Xa (7), 
X70 X9,10 
X710 Xs,i0 X9,10 
where we have turned to account the relation 
X78 X910 — X79 Xsi0 + Ario X89 =O . « « « (8), 
existing between the determinants of the assemblant (3). 
By developing the other denominators of the equation (6) in the 
same way, we arrive, after omitting the factor 4? at: 
