Nipher — The Law of Contraction of Gaseous Nebulae. 155 



The value of 71 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 

 "^p J 2 — 2n 



C 



From the equations of a gas we have Gp — ^\=-t 5 ^^d 



Cp = kC,. Hence 



__ (7 /c 



These two equations give for n, 



n 



6/c— 4 

 5k — 3' 



(336) 



The value of the specific heat of hydrogen for gravitational 

 contraction is from (33) 



\dT)n 



365. 



Ritter's value computed from his equation is as before 

 stated : — 



(!£)__ 0.547. 

 XaTJn 



