M. E. Wiedemann on the Specific Heats of Gases. 93 



k and a the constants discussed on p. 90 ; 



6 the observed temperature-increase of the calorimeter ; 



6 l the corrected temperature-increase of the calorimeter ; 



t the mean temperature of the calorimeter ; 



M the temperature of the heating- vessel ; 



(R) the temperature-decrease of the gas ; 



e the specific heat of the gas. 



Air. 



The air coming from a gasometer was dried by passing- 

 through sulphuric acid in a Woulfe's bottle, and through a cy- 

 linder containing beads soaked in sulphuric acid. 



1 



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