244 Mr. William Sutherland on the 



In the third, 



Hence 



♦f{Kr*i)~£}* 



f % , If 1 ' f * Wo 1 f *' Mo 



"J,** + d, pdv+ l WTT) + 4 oloT^) 



3r 4 Wo_ i r F B'Tdo 



+ U,^ 2j Bj o 

 „, ,lf , 2, 2o 3 Z . 2# 



3Z/1 1\ E'T, # 



We must now evaluate the only integral that has been left 



unevaluated, 



r* (*'R'T/_ V^k'-vX, C k> ldv C k Mv 



& v x B V £ s *i-£ £ *W 



These last expressions are the only ones that introduce B and 

 @ into the value of J\, and it is desirable to remove these 

 two constants. At low pressures we can neglect the pv term 

 in the infracritical equation, and we get 



B/T VT_/ I p/rpVi-fl 

 B U'i JU-vJ 



removing B by means of this we get 



