Flues may leak from several causes, but
usually it can be traced to the carelessness of some one. You may have
noticed before this that I am inclined to blame a great many things to
carelessness. Well, by the time you have run an engine a year or two
you will conclude that I am not unjust in my suspicions. I do not blame
engineers for everything, but I do say that they are responsible for a
great many things which they endeavor to shift on to the manufacturer.
If the flues in a new boiler leak, it is evident that they were slighted
by the boiler-maker; but should they run a season or part of a season
before leaking, then it would indicate that the boiler-maker did his
duty, but the engineer did not do his. He has been building too hot a
fire to begin with, or has, been letting his fire door stand open; or he
may have overtaxed his boiler; or else he has been blowing out his
boiler when too hot; or has at some time blown out with some fire in
firebox. Now, any one of these things, repeated a few times, will make
the best of them leak. You have been advised already not to do these
things, and if you do them, or any one of them, I want to know what
better word there is to express it than "carelessness.
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