Nipher — The Law of Contraction of Gaseous Nebulae. 153 

 This is of course the value for specific heat given in the 



4 



table for n = ^. 



o 



The values called for in (29) may also be found from 

 equations of this paper. From eqs. (10) and (11), 



where P and B = are given in terms of 7?, as will be seen, 



dP _ 2n dR 



^ = — 2 — n "TT 



dv _ 2 dR 

 IT ^2—n W' 



These values, in eq. (29) give eq. (30). This equation is 



the same as (5) as may be easily seen by equating the values. 



But all of this leaves the value of n wholly undetermined. 



4 

 If the value n = ^ which Ritter assumed, be substituted in 

 o 



(19) and in various other equations containing the factor 

 4 — 3/i, the co-efficients in m reduce to zero. This value of 

 n calls for an impossible distribution of matter, in a grav- 

 itating nebula. This will be pointed out more fully as we 

 proceed. 



What we have done is to assume the general relation 

 Py« z= A. We find as a consequence, that at the surface of 

 any fixed mass 31, forming the core of a gravitating gaskugel, 

 (eq. 26) 



^ Jc / Air \\ 4 1 



2?i \ 4 — on/ ^ ^ 



4 

 How can this result justify the assumption that ^^ = o for 



such a gravitating mass? 



This matter has been under consideration for several years, 

 and it was only recently observed, that n could be computed 

 by an independent method, as will now be explained. 



