Cipher — The Law of Contraction of Gaseous Nebulae. 157 

 ""^ (18)'. 



(19)' 

 (20)' 

 (21)' 

 (22)'. 



Pv^ = 1.034. Jc]\P . (23)' 



Equations (24) and (25) need not be rewritten. 

 The work done in compressing a mass M^ from an infinite 

 volume to a sphere having a radius JR is 



00 



W=4.7r\B^PdB. 



f 



The value of P being obtained from (19) this integral is 



Tr=.i=i!^ ^^ " (34) 



n 2B ^ "^ 



0.636 J^ 

 2B 



If an isothermal distribution of temperature were possible 

 during the compression, n would be unity and the coefficient 



