Some Physical Properties of Nitric Add Solutions. 101 



Curve II. Results at the three temperatures from 28 to 42 per cent, 

 with intersection of lines at about 33 per cent. ; in the lowest curve 

 the results slightly above and below 33 per cent, are represented on a 

 short cross line. 



690 

 680 



670 

 660 



650 



640 



63O 



JL 



$680 

 570 

 560 



550 

 540 

 5SO 

 520 

 510 



/ 



28 23 30 



/ 



Percentages. 



VOL. LXIX. 



