ROt '-TUMBLE ENGINEEK. 105 



you utilize the < c force of the steam instead of 



using the live steam from the boiler. A great many 

 good engines are condemned and said to use too much 

 1 all because the engineer takes no pains to 

 utilize the steam to the best advantage, 



II ady advised you to carry a "high pressure;" 



by a high pressure I mean anywhere from 100 to 



Ns. I have done this expecting you to use the steam 



rly whenever possible, and the i 

 force of steam increases very rapidly after you have 

 reached 70 Ibs. Steam at 80 Ibs. used expansively 

 will do nine times the work of steam at 25 Ibs. 

 Note iTerence. Pressure 3 1-5 times greater. 



Work performed, 9 times greater. I give you 

 ug that you will take advantage of 

 them, and if your engine at 100 or no Ibs. will do 

 rk cutting off at %. don't allow it to cut off at 

 y 2 . If cutting off at l /2 will do the work, don't allow 

 it to ait off at #, and the result will be that you will 

 do the work with the least posible amount of fuel, 

 and no one will have any reason to find fault with you 



>ur engine. 



Now we have given you the three points which are 

 absolutely necessary to the successful handling of a 

 : on engine. We went through it with you when 

 running as a stationary: then we gave you the point- 

 ers to be observed when running as a traction or road 



