ENGINE No. 69. 



Four valve, 11" x 30". Speed, 80 revolutions per minute. 



This engine has double-poppet admission valves, and slide 

 valves for exhaust ; all driven by a train of gears. 



The steam-valve cam was moved forward \" on its shaft, and 

 the exhaust cam \" . The diagrams are taken from the crank 

 end, No. 69a before, and No. 696 after, the adjustments. 



ENGINE No. 69a 



ENGINE No. 69b 



290 



