(a) to reduce the amount of time study observation necessary to be taken, (b) to reduce the difficulties of synthesizing the time studied element, (c) to locate quickly just where the worker needs help and instruction to enable him to achieve his task, (d) to keep up the interest of the worker by having short time elements with which to measure his relative ability, (e) to present the subject-matter of instruction in such natural subdivisions that resting places are automatically provided that allow the mind to recover from its absorption of each subdivision. This provides definite stopping places between co-related units of instruction holding the attention as a complete unit against distraction, and a complete resting place between subdivisions that permits the mind to relax and wander without losing complete grasp of each unit as a whole. DETAILED INSTRUCTION EDUCATIVE.--The greater the perfection of the detail of the instruction card, the greater the educative value of this plan of management. The educative value of the instruction card will be discussed at length under Teaching. Those inexperienced in Scientific Management have complained that the detail of Instruction Cards and other parts of Scientific Management is tiresome. Dr. Taylor has answered such objectors in Discussions, and also in his own directions for planning the Instruction Card, which are to be found in "Shop Management." The advantages of the detailed instruction card are more than might appear on the surface. Not only does the man whose attention is easily distracted keep to his work better if he is told every possible detail, but also the cards when filed can be taken out again, and every detail and item of the method reviewed at length and revised if necessary. The experienced worker who gets to know the instruction by rote is not bothered by extreme detail. On the contrary, he grasps it at a glance, and focuses his mind upon any new feature and upon the speed and exactness of muscular action needed for compliance with the card. LANGUAGE OF INSTRUCTION CARD IMPORTANT.--The language in which instructions and commands are transmitted on the instruction card is of sufficient importance to warrant careful consideration. It would be helpful if the instruction card clerk and the man who is to use the instruction cards were both masters of English, but this is hardly to be expected. The best substitute for such special English training is a "System" for the use of the instruction card clerk that will give him some outline of English that will by degrees make his wording terse, simple and unambiguous.