ENGINE No. 25. Ill 



air-pump. The cylinders were arranged for running one end 

 of one cylinder non-condensing, and it was under these condi- 

 tions that the tests were made. Steam is furnished by cylinder 

 boilers, and it is presumed that it was in a commercially dry 

 condition. When the water was carried at an unusually low 

 point, a small portion of the shell became steam-heating sur- 

 face, and the steam was found to be slightly superheated. Two 

 of the steam valves showed some leakage. The pistons also 

 leaked a small amount. The remaining valves were fairly 

 tight. The load consisted of cotton machinery. 



