MOTIVE POWER OF HEAT. 



183 



above (Table I.) for the same temperatures, as de- 

 rived from Regnault's observations on the vapor 

 of water. 



44. It may be observed that the discrepancies 

 between the results founded on the experimental 

 data supplied by the different observers with ref- 

 erence to water at the boiling-point, are greater 

 than those which are presented between the results 

 deduced frotn any of the other liquids, and water 

 at the other temperatures ; and we may therefore 

 feel perfectly confident that the verification is 

 complete to the extent of accuracy of the obser- 

 vations.* The considerable discrepancy presented 



* A still closer agreement must be expected when more 

 accurate experimental data are afforded with reference to 

 the other media. Mons. Regnault informs me that he is 



