8ATUBATXD STEAM, ASl> OTHER VAPORS. 



|| 



ROWLAND'* MK< !i \ U i , - M.KM -K I1KAI. 



It 



9 



1 

 I 



4 

 5 

 6 



T 



I 



II 



It 

 IT 



1.0068 

 L018B 



mo 



M6M 



I...T 

 LOH 

 MM 

 MM 



I.-.". 



MMO 



1040 

 IOM 

 10M 



IT.". 



um 



MM 



8861 



tfl.6 



4_'T.T 

 4-7 I 



MM 



MUM 



LLOM 



12.061 



iao06 



11.060 



14.008 

 IMM 



IMM 



14..-V1 

 15.068 



TT1T 



MM 



4-.V..4 



Mil 



18.088 

 10.068 

 20.068 

 U.OM 



17.066 

 18.066 



XX066 



21.084 



M 

 H 



M 



n 



M 



n 



M 



40 

 41 



uvn 

 lam 

 HIM 



L1MI 

 11978 



I 

 J 



Mi T 



18675 

 MMfl 



4 -, | 



M T 



81.080 

 82.018 

 MAM 

 84.011 



MLMI 



KS 



n OBI 



MM 

 88.007 



16801 

 17088 



Uble, column 1 gives the number of degrees above 



on the Centigrade scale ; column 2 gives the number of kilogramroetres 



; iKl to raise one kilogramme of water from freezing point to the given 



rature; column S is Rowland's mechanical equivalent of heat at the 



from 10 intervals on column 2; column 



obtained by dividing the numbers in column 2 by the mechanical equivalent 



it at 16} C., or 62 F., from column 3 ; and column 5 is calculated by 



considering the specific beat to be constant for each five degrees of tempera- 



ture. These specific heats were derived from a curve obtained by plotting 



ratures for abscissa?, and heats of the liquid for ordinates. The values 



beats will jx? given later, in connection with those for higher 



temperatures. 



v of the preceding table shows that the specific heat at low teoh 

 peratnres varies quite markedly, so that it appeared advisable to investigate 

 the effect of this variation on Regnault's ex|>oriroents already quoted. 

 vas done quite expeditious! tiplying the mean sp 





by him for his several ex| ly the true average specific beat for the 



range of temperature in the calorimeter. This corrected specific beat was 

 then used to calculate the increase of heat from the final temperature of the 

 calorimeter to the temperature of the boiler. :m-l that increase was added to 

 the heat of the liquid from the table to find the heat of the liquid at the 



