Manchester Memoirs, Vol x/v. (igoi), No. 10. g 

 Here the shaded portion represents the net effect of the 

 clearance steam, whilst the dryness fraction is 



/H 



The 



dotted curve represents the result of using a saturation 

 curve for the expansion of the clearance steam. 



The cycle of changes may be considered as follows : 

 heating of water from K to G ; evaporation from G to B, 

 expansion from B to D, and condensation from D to K. 

 The total amount of work obtained in that case is repre- 



sented by the area KGABCDK, whilst of this the work^ 

 represented by KGA/K has to be deducted, as done upon 

 clearance steam, and, although apparently lost, must 

 finally partially reappear in its influence on the form of 

 the expansion curve. 



In the case of two or more cylinders, if the variations 

 of pressure and volume in the receiver are known, the 

 complete cycle for the passage of the steam through the 



