48 ROUGH-AND-TUMBLE ENGINEERING 



precaution in looking after the screen in the stack. If it 

 burns out get a new one. With reasonable diligence and 

 care, you will never set anything on fire, while on the 

 other hand, a careless engineer may do quite a lot of 

 damage. 



There is fire about an engine, and you are provided 

 with the proper appliances to control it. See that you 

 do it. 



WHY GRATES BURN OUT 



Grates burn through carelessness. You may as well 

 make up your mind to this at the start. You never saw 

 grate bars burn out with a clean ash box. They can only 

 be burned by allowing the ashes to accumulate under 

 them till they exclude the air when the bars at once be- 

 come red hot. The first thing they do is to warp, and 

 if the ashes are not removed at once, the grate bar will 

 burn off. Carelessness is neglecting something which is 

 a part of your business, and as part of it is to keep your 

 ash box clean, it certainly is carelessness if you neglect 

 it Your coal may melt and run down on the bars, but if 

 the cold air can get to the grates, the only damage this 

 will do is to form a clinker on the top of grates, and shut 

 off your draught. When you find that you have this kind 

 of coal you will want to look after these clinkers. 



Now if you should have good success in keeping steam, 

 keep improving on what you know, and if you run on 



