26 AND-TUMBLE ENC1N MIC RING 



PART TWO. 



WATER SUPPLY. 



If you want to be a successful engineer it is necessary 

 to know all about the pump. I have no doubt that many 

 who read this book cannot tell why the old wooden pump 

 (from which he has pumped water ever since he was tall 

 enough to reach the handle) will pump water simply 

 because he works the handle up and down. If you don't 

 know this I have quite a task on my hands, for you must 

 not attempt to run an engine until you know the principle 

 of the pump. If you do understand the old town pump, 

 I will not have much trouble with you, for the same 

 principles are used in the cross head pump. Do not 

 imagine that a cross head pump is a machine to be 

 dreaded. It is only a simple lift and force pump, driven 

 from the cross head. That is where it gets its name, and 

 it doesn't mean that you are to get cross at it if it doesn't 

 work, for nine times out of ten the fault will be yours. 

 While I am well aware that all traction engines do not 

 have cross head pumps, yet with all respect to the builders 

 of engines who do not use them, I am inclined to think 

 that all standard farm engines ought to have one, because 

 it is the most simple, the most economical, and if prop- 

 erly constructed, the most reliable pump made, 



