8 Grindle\', TJiermodynamus of Superheated Steam. 



Table III. 

 Values of the product CKp. 



Formula (4) is really a very important one, as it 

 represents the value of the product of the cooling effect 

 and the specific heat in superheated steam not near satura- 

 tion point, and cannot, from the mode of its deduction, be 

 much in error, the only equation required in the process 

 being the thermodynamically correct one 



CK,. 



[dr], 



(5) 



and hence equation (4) will undoubtedly prove useful in 

 checking any values of the cooling effects (7 and specific 

 heats Kp found for superheated steam not near saturation. 



V. On the densities of Saturated Steam. 



It appears, from the data already existing on the 

 density of dry saturated steam at any pressure, that we 

 must either rely for the determination of these densities 

 on Regnault's latent heats, to which the densities are 

 inversely proportional, or obtain them by deduction from 

 the properties of superheated steam. 



The first method is the one usually adopted, and, if it 

 can be shewn that the latent heats determined by Reg- 



