The text books upon psychology are filled with illustrations and examples of the habit phase or plane of the mental operations, and we do not think it necessary to repeat instances of the same kind here. Everyone is familiar with the fact that tasks which at first are learned only by considerable work and time soon become fixed in some part of the mind until their repetition calls for little or no exercise of conscious mental operation. In fact, some writers have claimed that no one really "learns" how to perform a task until he can perform it almost automatically. The pupil who in the early stages of piano playing finds it most difficult to control and manage his fingers, after a time is able to forget all about his fingering and devote his entire attention to the pages of his music, and after this he is able to apparently let his fingers play the entire piece of music by themselves without a thought on his part. The best performers have told us that in the moments of their highest efforts they are aware that the out-of-conscious portion of their mind is doing the work for them, and they are practically standing aside and witnessing the work being done. So true is this that in some cases it is related that if the performer's conscious mind attempts to take up the work the quality is impaired and the musician and the audience notice the difference. The same thing is true in the case of the woman learning to operate the sewing machine. It is quite difficult at first, but gradually it grows to "run itself." Those who have mastered the typewriter have had the same experience. At first each letter had to be picked out with care and effort. After a gradual improvement the operator is enabled to devote her entire attention to the "copy" and let the fingers pick out the keys for themselves. Many operators learn rapid typewriting by so training the habit mind that it picks out the letter-keys by reason of their position, the letters being covered over in order to force the mind to adapt itself to the new requirements. A similar state of affairs exists wherever men or women have to use tools of any kind. The tool soon is recognized by the mind and used as if it were a part of the body, and no more conscious thought is devoted to the manipulation than we devote to the operation of walking, which, by the way, is learned by the child only by the expenditure of time and labor. It is astonishing how many things we do "automatically" in this way. Writers have called our attention to the fact that the average man cannot consciously inform you how he puts on his coat in the morning--which arm goes in first, how the coat is held, etc. But the habit mind knows--knows very well. Let the student stand up and put on his coat in the regular way, following the leadings of the habit mind. Then, after removing it, let him attempt to put it on by inserting the other arm first, for instance. He will be surprised to find