some Thermodynamical Relations. 



S 



41 



12. Sulphur and Carbon Bisulphide, p^-. Temperatures 

 of carbon bisulphide taken as correct. c= —'0006845. 





Eatios. 



Absolute temperatures 

 of Sulphur. 



Pressures. 

















From observed 



Smoothed. 



Eecalculated. 



Observed. 





temperatures. 









millim. 











300 



2-2783 



2-2779 



667-9 



668-0 



400 



2-2733 



2-2727 



683-5 



683-7 



500 



2-2681 



2-2685 



6962 



696-1 



600 



2-2650 



2-2649 



7070 



7070 



700 



2-2607 



2-2617 



7164 



716-1 



800 



2-2588 



2-2588 



724-6 



724-6 



900 



2-2558 



2-2563 



7322 



7320 



1000 



2-2530 



2-2540 



739-3 



739-0 



1500 

 2000 





2-2444 

 2-2372 



767-4 



788-15 



788-2 



2-2373 



3000 



2-2262 



2-2262 



820-8 



820-8 



The close agreement between the observed and recalculated 

 temperatures of such a high-boiling substance as sulphur is 

 very striking. 



13. Carbon Bisulphide and Ethylene. 

 tures of carbon bisulphide taken as correct. 



cs 2 

 c 2 a;- 



Tempera- 

 000274. 



Pressures. 



Eatios. 



Absolute temperatures 

 of Ethylene. 



From observed 

 temperatures. 



Smoothed. 



Eecalculated. 



Observed. 



millim. 

 50 

 100 

 150 

 200 

 300 

 400 



1-8212 

 1-8242 

 1-8263 

 1-8283 

 1-8325 

 1-8339 



1-8208 

 1-8244 

 1-8268 

 1-8287 

 1-8315 

 1-8336 



139-5 



146-8 



151-35 



154-9 



1601 



164-0 



139-5 



146-75 



151-4 



154-9 



160-0 



1640 



Here again the agreement is very remarkable, considering 

 the difficulty of measuring very low temperatures accurately. 



14. Water and Oxygen. - A ' « Temperatures of water 



taken as correct. c= —'0003932. 

 Vapour-pressures of oxygen have 



been determined bv 



