518 Mr. J. P. Dalton on the Saturation Constants 

 and also by A. Batschinski *, who calculated volumes only 



<p. 



6. 



OV 



** 



90° 



1 



1 



1 



40° 



0-89894 



0-6021 



2-3625 



25° 



0-80247 



0-5190 



41 103 



15° 



069682 



0-4659 



7-9828 



8° 



0-58213 



0-4275 



19 585 



4° 



0-48222 



0-4028 



5730 



2° 



040712 



0-3877 



178-8 



0° 15' 



030723 



0-3709 



1974 



2. The constants may be obtained from the pu-isothermals 

 using Maxwell's criterion. This method was employed by 

 H. Hilton f, who gives the following table : — 



e. 



jr. 



"i- 



1 



0-937 



0-773 



0-660 



1-84 



0-875 



0-587 



- 573 



2-53 



0-844 



0-486 



0-545 



3-31 



0-750 



0-281 



0-495 



4-83 



0-625 



0-090 



0441 



— 



OuOO 



0048 



0-418 



— 



3. They may also be obtained graphically by means of the 

 thermodynamic potential. E. Riecke % using this method 

 obtained the following : — 



e. 



.- 



», 



io.,. 



60 



0-109 



0432 



16-60 



0-65 



0137 



0448 



10-90 



0-70 



0199 



0-466 



7-75 



0-75 



0-288 



0-489 



5 - 5 3 



0-80 



0-384 



0-517 



4-14 



0-85 



0-507 



0-553 



3-05 



0-90 



0-650 



0-602 



232 



095 



0-807 



0-693 



1-78 



4. A second graphical method is given by the use of the 

 free energy. This method was adopted by Kamerlingh 



* A. Batschinski, Zeits. f. phys. Chemie, xli. p. 743 (1902). 

 t H. Hilton, Phil. Mag. [6] i. p. 579, and ii. p. 803 (1901). 

 t E. Riecke, Wied. Ann. tiii. p. 379 (1894). 



