Niplier — The Law of Contracts m of Gaseous Nebulae. 155 



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

 It seems to be a constant. 



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



C 3?i — 4 



^^~J 2 — 2n 



C 



From the equations of a gas we have Cp — ^\=-r '■> ^^^ 



Cp=^kC^. Hence 



Cp=-T 



C K 



^~ J AC— 1 



These two equations give for n, 



6«— 4 



5« — 3 



(33^)) 



The value of the specific heat of hydrogen for gravitational 

 contraction is from (33) 



XdTJn 



7.365. 



Ritter's value computed from his equation is as before 

 stated : — 



aT I n 



= _ 0.547. 



