Nipher — On Gravitation in Gaseous Nebulae. 65 



It is evident that (7) with 1 variable is an expression of 

 the law involved in (22) and which was first announced 

 bv A. Ritter* in the form 



Tr = T^r^ = constant. 



According to (7) 



ri?=|^. (23) 



where Tc is the gravitation constant whose value is given 

 below, C is the constant for the kind of gas (Pv T~^), and M 

 is the mass of the gravitating gas within radius R from the 

 center of mass. 



Equation (23) is in a form which makes it available for 

 inquiry into cosmical problems. 



It may be of interest to apply these equations to an infinite 

 mass of gas, having the physical constants which hydrogen 

 has under ordinary conditions such as we can supply at ordi- 

 nary temperatures. Imagine the central core of this mass, to 

 have within a radius equal to that of our sun, a mass equal to 

 that of the sun. 



The quantities thus given are 



M= 1.842 X 10^3 grammes. 

 R = 6.972 X 10^*^ cm. 



^= 1.543 X 10^ in C. G. S. units. 

 C = 4.143 X 10^ 



By equation (23) 



Mk 

 T = 2^^ = 20,675,000" C. 



This temperature is certainly much greater than that of 

 the sun. 



• Ann. der Phye. u. Chemie, Bd. V, 1878, S. 646. 



