RATIO OF SPECIFIC HEATS. 27 



h. OXYGEN. 



Commercial oxygen obtained from Dr. Elkan in Berlin was used. The method 

 of experiment did not differ from that detailed for air. The results are as follows : 



Mean « = 1.3956. 



Correction for radiation -|- .0021. 



Final value (corrected),' « = r.3977. 



C. CAKBON-DIOXIDE. 



The gas was obtained from a cylinder of commercial, liquid carbon-dioxide. 

 Hence it was passed through the drying train into the copper receiver for experiment. 



Mean « := 1.2974. 



Correction for radiation + .0021. 



Final value (corrected), « = 1.2995. 



cl. HYDROGEN. 



Commercial hydrogen obtained from Dr. Elkan in Berlin was passed through 

 a solution of permanganate of potash and thereafter treated in the manner specified 

 for air. 



Mean h — 1.4063. 



Correction for radiation + .0021. 



Final value (corrected), « = 1.4084. 



