See — Temperature of the Sun and Ages of Stars and Nebulae. 15 



167r2 

 3 



2'= 176868. 



The potential of the solar sphere upon itself * is given by 



B'dB 



^0 '=' ^B. , 



16^2 



T5~ ( 



+ -'''-\-^i\{B^.,-B\)'^( 



23) 



♦ Cf. Astronomische NachrichUn, No. 3686. 



