



boiler all the pressure you want, you can then 



flues carefully, and should you find any seeping of 



>u can use your header lightly until such leaks 



are stopped. If the watt; A ill not afford you sum- 



rmtf it up to the required pres- 

 sure by attaching a good hand force pump. 



In tor the purpose of ascertaining if you have 



a good job on your flues, it is not necessary to put on any 

 greater cold water pressure than you are in the habit of 

 1 r : mce, if your safety valve is set at 

 one hundred and ten pounds, this pressure of cold water 

 will be sufficient to test the flues. 



Now, suppose you are out in the field and want to test 



your flues. Of course, you have no hydrant to attach to, 



and you happen not to have a force pump, it would seem 



you were in bad shape to test your boiler with cold water. 



Well, you can do it by proceeding in this way: When 



i' expanded and beaded all the flues that were 



will then close the throttle tight, take off the 



safety valve (as this is generally attached at the highest 



point) and fill the boiler full. It is absolutely necessary 



that all the space in the boiler should be filled with cold 



:. Then screw the safety valve back in its place, 



will then get back in the firebox with your tools and 



have someone place a small sheaf of wheat or oat straw 



under the firebox or under waist of boiler if open fin 



and set fire to it. The expansive force of the water 



