ENGINE No. 74. 



Four valve, 18" x48". Speed, 64 revolutions per minute. 



All the valves in this engine are slides driven by double ec- 

 centrics. The adjustments consisted in advancing the steam- 

 valve eccentric lj" on the 9" shaft, and the exhaust eccentric 

 j- inch. The diagrams were taken from the head end, No. 

 before, and No. 746 after, the changes. 



ENGINE No. 74a 



ENGINE No. 74b 



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