46 



ENGINE TESTS. 



The marked effect of superheating is indicated by comparing 

 these two tests. By superheating the steam 82 degrees the con- 

 sumption of feed-water per I. H. P. per hour was reduced about 

 9 per cent. A feature in these results is the effect upon the 

 steam accounted for by the indicator. It increases between cut- 

 off and release from 24.6 pounds to 25.26 pounds when ordi- 

 nary steam is used, whereas the contrary effect is produced 

 under the influence of the superheating, the quantity falling 

 from 25.42 pounds to 24.15 pounds. 



ENGINE No. 1 



Head End 



Crank End 



-60 



-40 



-20 



- O 



-60 



-40 



-20 



- 



