( 798 ) 



TABLE I. 



6-22M, h 



llM 



///, 



in. 



0.0014 



0.000134 



0.000011 



0.0179 



0.000527 



0.000022 



The plait extending on the «//-surface from v = b for a temperature 

 y>Tk\> will have to be considered as a gas-gasplail according to 

 §4 (cf. §6). Also a similar plait for 7'<^ 7\, it' the connodal curve 

 is not touched by an isomignic line, and is nowhere cut by an 

 isomignic line which intersects the connodal curve of the plait coming 

 from x = V According to § 4 we shall he justified in considering 

 also the plait lying on the side of the small v's for 7'/,, >7 7 >>7',/„/ 

 (temperature for which the double plaitpoint considered occurs) as 

 gas-gasplait, if the temperature is above the critical temperatures of 

 the unsplit mixtures for all parts of that plait. That there can be 

 some reason for doing so, appears when we calculate the reduced 

 temperature for the double plaitpoint for some cases, e.g. for the 

 ratios &22m/^hm all< ' '' R ' m * belonging to it, mentioned in Table I. 



Putting &22M/^hM = n ^e double plaitpoint temperature is deter- 

 mined by : 



and 



27 (n— m*y 



Ta ,i I TV = — m(l-fm) 



2 m (n + w) 3 



'•dpi »fci — 3 (i + m y • m (2_ m ) — n (l— 2m) 

 So for the case represented on Plate II we find : 



x chA = 0.587, 7^/7^ = 0.966, T d/tl /T kx = 2.17. 



(To be continued). 



l ) Here it appears that a gas-gasplait can occur also if Tkm < Tk x , and for 

 temperatures T<Tk, with Tk-m>Tk x , (cf. p. 794 note 1 and p. 794). 



(April 25, 1907). 



