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



176868. 



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



16tt 2 f ™,„ 16tt 2 

 -y- I aXRhlR = -g- 



^V^X. I R*dR 

 7? 



^ X i? 5 + rr 1 X 1 ( R* - i? e 5 ) + * 2 X 2 ( Rj> - R* ) 



+ 



+ <7 



M&i+i-**i)}<**) 



* Cf. Astronomische Nachrichten, No. 3586. 



