ROUGH-AND-TUMBLE ENGINEERING 3 1 



cock, the latter must be closed, you may 

 be rca.vnal.ly certain now that the pump is working til 

 right. If at any time you are in doubt as to whether the 

 ing the water through the pipes, you can 

 . ascertain by opening this drain cock. It will al- 

 ways discharge cold water when the pump is working. 

 . to tell if the pump is working, is by plac- 

 ing your hand on the first two check valves. If they are 

 cold the working all right, but if they are warm, 



the cold water is not being forced through them. 



A stop cock should be used next to the boiler, as you 



can ascertain whether it is open or shut by merely looking 



at it. while the globe valve can be closed by some meddle- 



som< and you would not discover it, until some 



of your pump is broken by forcing water against it. 



Now if 1 were to sit down and "Talk engine" to you, 

 I no doubt would say things that would need explain- 

 ing, or, in other words ought to be made clearer, for in- 

 stance on page 9, I say, (In referring to an engine whose 

 l might be a ''little tight,") "keep them well oiled." 

 this means that you must keep your lubricator in 

 good shape. That is you must see that the cylinder is 

 getting- plenty of oil, for this is the only way to "oil the 

 rings." 



It is very important when the pump fails to work to 

 ascertain what the trouble is. If it should stop sud- 



