ENGINE No. 10. 71 



anced slides. The cut-off valve rides on a seat in the interior 

 of the main value, which is of box pattern. The cut-off valve 

 is controlled by a shaft governor. One test was made with 

 the engine running condensing, and one running non-condens- 

 ing. Steam is furnished by superheating vertical boilers, which 

 are 190 feet distant from the throttle valves, the connecting 

 pipe being 10 inches in diameter. The loss of temperature 

 from the boilers to the engine amounted to 54 degrees. The 

 pistons and cut-off valves were practically tight. The main 

 valves showed some leakage. The engine worked in connec- 

 tion with water-wheels, and supplied power to a cotton-mill. 



From these results it appears that the consumption of steam 

 when the engine was run condensing was 5.13 Ibs. per I. H. P. 

 per hour less than when run non-condensing, or 20%. 



In making this comparison it should be observed that there 

 was a comparatively poor vacuum, both in the cylinders and in 

 the condenser, which acted unfavorably upon the condensing 

 result ; and this was further influenced in the same direction 

 by the relatively small amount of superheating. 



