Nipher — The Law of Contraction of Gaseous Nebulae. 165 



The value of ii for various gases is computed in a table. 

 It seems to be a constant. 



If eq. (33a) be solved for Cp we have 



_(7 3n — 4 



J 2 — 2n 



C 



From the equations of a gas we have Cp — C^=-j ; and 

 Cp=^kC^. Hence 



G.^-r 



C K 



^^ J K—\ 



These two equations give for n, 



n = 



6a:-- 4 

 5/c — 3' 



(33^>) 



The value of the specific heat of hydrogen for gravitational 

 contraction is from (33) 



(41) =-7.365. 



Ritter's value computed from his equation is as before 

 stated : — 



