34 ALF GULDBERG. M.-N. KI. 
left-hand members of the above two equations must be rejected. There 
remain then only the combinations formed by equating to zero the first 
factors of one of these members, and the second factors of the other. 
We should thus obtain the combination 
Fy 
et 
TÉCELS 
Ras 
with the combination which would be obtained from this by interchanging 
Å, and A,. 
That these systems are relevant to the solution of the problem under 
consideration may be shown by eliminating from either of them, by 
means of the equations 
+40 a+ T8 +70 
(+ Le +X7+22=0 
the quantities 
Ge) fs): a a år 
x)’ \ay)’ er’ as’ et’ 
The actual result will be 
Aa + Alk, He + (a nd) + BB? — ay) + H=o, 
which, when 
/ All, +4.) = B 
nA — = C, < 
reduces to the given equation. 
