Iodine and Bromine above Critical Temperature, 427 



mixture represented by some point on the curve, and a 

 portion be removed, B is thereby diminished, while % remains 

 unchanged. The point corresponding to this mixture lies to 



Fig. 4. 



•0085 



•0080 



•0075 



•0070 



•0065 



•0060 



•0055 



•0050 



•0045 



•0040 



•0035 



•0030 































































WFJL, 



h' 













^m< 













































Mi 















■n 



YA 















■B 

















iP^J 















ss 































•05 -10 -15 '20 -25 "30 



Iodine in CS 2 vapour. 



•50 



the left of the curve, and the lines should appear. This was 

 found to be the case. 



Similar investigations were made with bromine, the absorp- 

 tion spectrum of which is very similar to that of iodine. A 

 different method of measuring the halogen was adopted, 

 however. Seven drops of fluid bromine were brought into 



