12 ROUGH-AND-TUMBLE ENGINEERING 



reason is, that your glass may fool you, for you see the 

 try-cocks may lime up. so may your glass gauge cocks, 

 but you say you use them. You use them by looking at 

 them. You are not letting the steam or water e 

 from them every few minutes and thereby cutting the 

 lime away, as is the case with try-cocks. Now you want 

 to know how you are to keep them open. Well, that is 

 easy. Shut off the stop gauge and open the drain cock 

 at bottom of gauge cock. This allows the water and 

 steam to flow out of the lower cock. Then after allow- 

 ing it to escape a few seconds, shut off the lower gauge 

 and open the top one, and allow it to blow about the 

 same time. Then shut the drain cock and open both 

 gauge cocks, and you will see the water seek its level, 

 and you can rest assured that it is reliable. This little 

 operation I want you to perform every day you run an 

 engine. It will prevent you from guessing about the 

 water level. I don't want you to guess. I intend that 

 you shall know. You remember we said, if you know 

 you have water, you are safe, and every one around you 

 will be safe 



Now here is something I want you to remember. 

 Never be guilty of going to your engine in the morning 

 and building a fire simply because you see water in the 

 glass. We could give you the names of a score of men 

 who have ruined their engines by doing this very thing. 



