IO ROUGII-AND 



with the center of the glass gauge, or in other words, if 

 the water stands about the center of tin- it will at 



the same time show at the middle cock when tried. 



( .ill suppose that your glass gauge is in perfect con- 

 dition and the water shows two inches in the glass. 

 now try the lower cock, and find plenty of water; you 

 will then try the next upper cock and get steam. Now 

 as the lower cock is located below the water line, shown 

 by the glass, and the second cock above this line, you not 

 only see the water line by the glass, but you have a way 

 of proving it. Should the water be within two inches 

 of the top of glass you again have the line between two 

 cocks and can also prove it. Now you can kno\v for a 

 certainty where the water stands in the boiler, and we 

 repeat when you know this, there is nothing to fear from 

 this source. A properly constructed boiler never 

 plodes, except from low water or high pressure, and n* 

 we have already cautioned you about your safety valve, 

 you have nothing to fear, provided you have made up 

 your mind to follow these instructions, and unless you 

 can do this, let your job to one who can. Since yon 

 you will do as we have directed, we will then go back to 

 the gauges. Don't depend on your glass gauge alone, 

 for several reasons. One is, if you depend on the ? 

 entirly, the try-cocks become limed up and are useless, 

 solely because they are not used. 



