of its own friction. The Renown
Engine Oil has the peculiarity of body or lasting qualities combined
with the fact that it does not gum on the hot iron and allows the engine
to be wiped clean.

INJECTORS

The next in the list of inquiries was for a reliable injector. I was
not surprised at this for up to a few years ago there were a great many
engines running throughout the country with only the independent or
cross-head pump, and engineers wishing to adopt the injector naturally
want the best, while others had injectors more or less unsatisfactory.
In replying to these letters I recommend one of three or four different
makes (all of which I had found satisfactory) with a request that the
party asking for same should write to me if the injector proved
unsatisfactory in any way. Of all the letters received, I never got one
stating any objection to either the Penberthy or the Metropolitan. This
fact has led me to think that probably my reputation as a judge of a
good article was safer by sticking to the two named, which I shall do
until I know there is something better. This does not mean that there
are not other good injectors, but I am telling you what I know to be
good, and not what may be good. The fact that I never received a single
complaint from either of them was evidence to me that the makers of
these two injectors are very careful not to allow any slighting of the
work. They therefore get out no defective injectors. The Penberthy is
made by The Penberthy Injector Co., of Detroit, Mich., and the
Metropolitan by The Hayden & Derby Mfg. Co., New York, N. Y.

SIGHT FEED LUBRICATOR

These come next in the long list of inquiries and wishing to satisfy
myself as to the relative superiority of various cylinder Lubricators, I
resorted to the same method as persued in regard to injectors. This
method is very satisfactory to me from the fact that it gives us the
actual experience of a class of engineers who have all conditions with
which to contend, and especially the unfavorable conditions. I have
possibly written more letters in answer to such questions as: "Why my
Lubricator does this or that; and why it don't do so and so?" than of
any other one part of an engine, (as a Sight Feed Lubricator might in
this day be considered a part of an engine.) Of all the queries and
objections made of the many Lubricators, there are two showing the least
trouble to the operator. There are the Wm. Powell Sight