222 ENGINE TESTS. 



Engine No. 55 is a cross compound with horizontal un- 

 jacketed cylinders and a reheating receiver. The steam is 

 exhausted into a surface condenser operated by an independent 

 steam-driven air and circulating pump. The quantity of steam 

 used by the condenser was determined independently and 

 allowed for. The steam is taken from vertical water-tube 

 boilers in a slightly superheated state. The valves and pistons 

 of both cylinders were found to be in excellent condition 

 throughout, with practically no leakage. The load was an 

 electric generator located on the main shaft, furnishing current 

 for motors in a cotton mill. The steam condensed in the re- 

 heater coil amounted to three and one half per cent of the total 

 weight of steam passing the throttle valve. This is included 

 in the quantities given in the table. 



A noticeable feature in these results is the close agreement 

 between the four quantities given for steam accounted for by 

 the indicator. Three of these are practically equal, and the 

 fourth differs only one per cent. 



