Prof. Magnus on the Propagation of Heat in Gases. 



Thermometer with 



Gas 



Pressure. 



Cork screen. 



Metal scree 





mm 







Carbonic oxide . . . 



7600 



95 C. 







758-9 





6-8 C, 





14-4 





7-8 





110 



11-6 





Protoxide of nitrogen , 



, 760-0 



8-8 







752-5 





6-3 





289-0 





6-5 





17-7 





7-5 





12-0 



11-5 





Marsh-gas . . . , 



, 771-3 



9-4 







764-2 





7-0 





306-8 





73 





13-3 





7-8 





120 



11-6 





defiant gas ... 



. 749-1 



90 







319-2 



99 







268-8 



100 







19-8 



11-7 





Ammonia . . . . 



. 770-3 



8-1 







746-5 



8-3 







267-7 



9-4 







63-3 



10-8 







18-7 



10-9 







15-4 



110 





Cyanogen .... 



. 760-0 



8-8 







14-0 



11-4 





Sulphurous acid 



. 757-3 



7-8 







763-3 



8-0 







301-1 



9-1 







11-4 



11-0 





The hydrogen used in the experiments was prepared from zinc 

 and sulphuric acid ; it was dried by chloride of calcium^ but not 

 further purified. 



The oxygen was prepared from chlorate of potass and binoxide 

 of manganese. 



The carbonic acid was liberated from marble by dilute hydro- 

 chloric acid, and then passed through a tube containing bicar- 

 bonate of soda. 



The carbonic oxide was obtained by heating formiate of soda 

 with sulphuric acid, and 



The protoxide of nitrogen was obtained from nitrate of ammonia. 



The marsh-gas was obtained from acetate of soda with lime 

 and caustic soda. 



