ENGINE No. 86. 



Four-valve cross compound, 20" and 36" x 48". Speed, 65 

 revolutions per minute. 



The condenser of this engine is the siphon type, and the 

 injection water is supplied by an independent direckacting 

 steam pump. This is arranged so as to exhaust into the 

 receiver or into the condenser, as desired. The diagrams given 

 were taken under both of these conditions of running the pump ; 

 those with the full lines being taken when the pump was ex- 

 hausting into the receiver, and those with dotted lines when 

 the same was turned into the condenser. The comparatively 

 poor vacuum in the latter is due to the air leakage through the 

 parking around the valve stems and piston rod of the pump. 



ENGINE No. 86 



H.P. Cyl. 



L.P. Cyl. 



100 



- 80 



- 60 

 40 



- 20 







- 15 



- 10 



- 5 

 



- 5 

 10 



313 



