ROUGH-AND-TUMBLE ENG1NEEK 53 



work well in going up a steep hill with anything less 

 ill tank. Now, this may be considered a little 

 out of the engineer's duty, but it will save lots of annoy- 

 ance if lie has his tank supplied with this little appliance, 

 which is simple but does the business. 



A boiler should be washed out and not blown out. I 

 believe I am safe in saying that more than half the en- 

 gineers of threshing engines today depend on the "blow- 

 ing out" process to clean their boilers. I don't intend 

 to tell you to do anything without giving my reasons. 

 We will take a hot boiler, for instance; say, under 

 50 pounds of steam. We will, of course, take out the 

 fire. It is not supposed that anyone will attempt to 

 blow out the water with any fire in the firebox. We 

 will, after removing the fire, open the blow-off valve, 

 !i will be found at the bott< >west water 



point. The 1 out very rapidly with the 



pressure, and the last thing that comes out is the 



i. This steam keeps the entire boiler hot till e 

 thing is hlnwn out. and the result is that all the 

 dirt, sediment and lime is baked solid on the tubes 

 and sides of the firebox. Rut you say you know enough 

 not * :o pounds pressure. Well, we 



say 5 pounds, then. You will admit that the Miler is 



even at only 5 pounds, and if 

 you know enough not to blow off at 50 pounds, you 



