Physical Condition of Worker.

If the use of the machine induces either an adverse mental
attitude or physical condition of the worker, it will sooner or
later be adverse to the economic success of the machine.
We have indicated some of the problems and have suggested the
well-known method of mental control for this purpose. A keen
observer of men and machinery may not require as much of the
so-called practical experience; another may need many years of
actual work.
The practical experience in the various departments of machine
construction, its sale and its use, is undoubtedly almost
absolutely necessary for the average man in this work.
Its value is primarily to give an opportunity to see things in
actual operation. The shop affords an opportunity to see how a
machine stands up to its work, where it is weak, and a thousand
and one points that can best be seen in actual operation. But
there is still another phase that is comprehended more readily by
the practical experience, and this applies to the various
departments of business as well as to the works. It is the
knowledge of the men and their mental make-up and attitude.
A keen observer soon realizes that successful life in the
machinery world will not come easily to any one who lacks a good
understanding of others in the field.