32 



A. W. Witkowski on the 

 0= -35, £ = 238. 



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§ 15. These results prove conclusively that the specific heat 

 at constant volume is a variable quantity. For increasing 

 pressure the quantity c v increases at all temperatures, the 

 more so the lower the temperature. For small pressures the 

 corresponding isothermals converge approximately to the 

 value 0*169, which is the specific heat of air of ordinary 

 density. 



