e the construction of various other devices are such,
that while the valve may be equally as dry it does not show the want of
oil so clearly as the old style link. Yet as a fact I care not what the
valve motion may be, it requires a good grade of oil.

You may ask "how am I to know when I am getting a good grade of oil."
The best way is to ascertain a good brand of oil then use that and
nothing else.

We are not selling oil, or advertising oil. However before I get
through I propose to give you the name of a good brand of cylinder oil,
a good engine oil as well as good articles of various attachments, which
cut no small figure in the success you may have in running an engine.

It is not an uncommon thing for an engineer (I don't like to call him an
engineer either) to fill his sight feed lubricator with ordinary engine
oil, and then wonder why his cylinder squeaks. The reason is that this
grade of oil cannot stand the heat in the cylinder or steam chest.

If you are carrying 90 pounds of steam you have about 320 degrees of
heat in your cylinder, with I20 to I25 pounds you will have about 350
degrees of heat, and in order to lubricate your valve and valve-seat,
and also the cylinder surface, you must use an oil, that will not only
stand this heat but considerable more so that it will have some staying
qualities.

Then if you are using a good quality of oil and your link or reverse
begins to knock, it is because some part of it wants attention, and you
must look after it. And here is where I want to insist that you teach
your ear to be your guide. You ought to be able to detect the slightest
sound that is unnatural to your engine. Your eyes may be deceived, but a
well trained ear can not be fooled.

I was once invited by an engineer to come out and see how nice his
engine was running. I went, and found that the engine itself was
running very smooth, in fact almost noiseless, but he looked very much
disappointed when I asked him why he was doing all his work with one end
of cylinder. He asked me what I meant, and I had some difficulty in
getting him to detect the difference in the exhaust of the two ends, in
fact the engine was only making one exhaust to a revolution. He was one
of those engineers who never discovered anything wrong until he could
see it. Did you know that there are people in the world whose mental
capacity can only grasp one idea at a time. That is when their minds
are on any one object or