PSYCHOLOGY ALREADY AIDING THE INDUSTRIES IN SUCH STUDY.—­Study of the Psychological Review will demonstrate the deep and increasing interest of psychologists in the subject of fatigue.  The importance of such stimulating and helpful work as that done by Doctor A. Imbert of the University of Montpellier, France, is great.[19] Not only are the results of his investigations commercially valuable, but also they are valuable as indicating the close connection between Psychology and Industrial Efficiency.

IMPORTANCE OF HABITS.[20]—­Prof.  William James says “an acquired habit, from the psychological point of view, is nothing but a new pathway of discharge formed in the brain, by which certain incoming currents ever after tend to escape.”

And again,—­“First, habit simplifies our movements, makes them accurate, and diminishes fatigue,"[21] and habit diminishes the conscious attention with which our acts are performed.  Again he says, page 144, “The great thing, then, in all education, is to make our nervous system our ally instead of an enemy; as it is to fund and capitalize our acquisitions, and live at ease upon the interest of the fund.  For this we must make automatic and habitual, as early as possible, as many useful actions as we can, and guard against the growing into ways that are likely to be disadvantageous to us, as we should guard against the plague.”

    These quotations demonstrate the importance of habit.

How deep these paths of discharge are, is illustrated by the fact that often a German, having spent the early years of his school life in Germany, will, even after learning to speak, read, write and think in English, find it difficult to figure in anything but German.

HABIT EASILY BECOMES THE MASTER.—­Another illustration of the power of habit is exhibited by the bricklayer, who has been trained under old-time methods, and who attempts to follow the packet method.  The standard motions for picking up the upper row of bricks from the packet are entirely different from those for picking up the lower row.  The bricklayers were taught this, yet invariably used the old-time motions for picking up the bricks, in spite of the waste involved.[22]

WRONG PRECONCEIVED IDEAS HAMPER DEVELOPMENT.—­Wrong habits or ideas often retard development.  For example, it took centuries for artists to see the colors of shadows correctly, because they were sure that such shadows were a darker tone of the color itself.[23]

TEACHING UNDER SCIENTIFIC MANAGEMENT RESULTS IN GOOD HABITS.—­The aim of teaching under Scientific Management, as has been said, is to create good habits of thinking and good habits of doing.