192 ENGINE TESTS. 



ment and accidental difference of condition, the most that can 

 be said is that the economy produced by the reheater was in 

 this case inappreciable. On test A there was 648 Ibs. of steam 

 per hour condensed and drawn off from the reheater tubes. 

 This is 4 % of the quantity used by the engine. The effect of 

 the heat derived from this source is seen in the increased 

 power developed by the L. P. cylinder, and the increase in the 

 amount of steam accounted for in the L. P. cylinder as com- 

 pared with that in the H. P. cylinder. 



The comparatively large amount of steam used b}^ the air- 

 pump is noticeable, being about 10 % of the entire quantity 

 on Test A. 



