Lovene for Lysets Forplantclse. 167 



2 (2t-f- 1) (2t+3)V^2t-t-rt2tCrü>); — 



3t+l 

 P+1 



ij(r''+V2t(r)di) =o, 



To 



J2"«r /(r*'2t (r)dr (^)dr)| = P'<'-o) = »= 



To 



2t— 2 / roo 



'*«'— ^ /Too 



"■o 



+ 



t/(5^2t(r)dr(^)d.)]| = o. 



1*2 



To 

 2t— 2 





To 



+iy (r^<I>'2t(r)d,(^)dr){ = o, 



fo 



t'(ro) +y r4>^ (r) -^dr~S j ^,,^^^^,,^3^ | = o, 



Af den 7de af disse Betîngelseslîgningcr sees, al 



To 



g^elîg' = t(ro)+y r "*^(r)dX^)dr. 



To 



Sætter man uu: 

 r 



y rfC('-)'-^'dr= B(r„) + B,(r„) k« + B,(r„) k* + . . . ., 



