398 Mr. R. T. Lattey on the Mutual 



The results obtained were as follows : — 



Per cent, amine. 



Temperature of 

 separation. 



Per cent, amine. 



Temperature of 

 separation. 



21-73 



154°5 



39-63 



143°5 



2265 



151-7 



45-78 



144-15 



25-04 



147-5 



48-89 



145 



25-06 



147 



51-71 



146-8 



28-60 



144-4 



54-24 



148-5 



3093 



144 



54-78 



150-3 



3403 



143-2 



58-59 



152-3 



38-18 



143-5 



58-99 



156 



The " critical " temperature so found is 143°'5 and the 

 "critical" concentration 37'4 percent, of amine; whereas 

 Guthrie's results lead to 121° and 19 per cent, respectively. 

 That this divergence is attributable to the glass seems not 



ICO 



30 



60 



SO 



40 



30 



20 





110 125 \30" 



Temperature — *■ 



135 



140 



145 



150° 



155 



160 



x Guthrie's Results. 

 • f?.T.L's Results. 



unreasonable when we read Guthrie's statement that "the 

 62'35-per-cent. solution caused the surface of the glass (soft 



