ENGINE No. 64. 



Four valve (Corliss), 23" x 48". Speed, 51 revolutions per 

 minute. 



The steam-valve rod was lengthened 6 turns, or 6 threads, 

 to reduce the lead. The diagrams are from the crank end, 

 No. 64a being taken before, and No. 646 after, the adjustment. 



ENGINE No. 64a 



ENGINE No. 64b 



284 



