The use of certain organs increases supply, and the use of others quickens waste; a balance should be maintained between the two. We must nourish the life-sustaining organs before using the organs which use up brain-supply, therefore we want to be sure that we are working according to these laws. A great many people have an idea that physical culture means building up big muscle. They measure the muscles of the arm and of the leg, and judge by their increase in size of the value of the exercise. This is not a correct measurement. Individuals may weigh themselves down by development of muscles until they have not sufficient internal vital force to carry so much weight. If we could only balance between the organs which supply nutriment and the organs which use it up, we would keep in perfect health. We want to learn how to secure a maximum of results with a minimum of force. That is, we want the body to be quickly responsive, to be flexible, to be so that we can use it for the things we want to do without wasting strength, and yet without being weighed down by a superabundance of muscular tissue. The first desideratum in taking exercise is to have every organ of the body free, therefore a gymnastic dress is a necessity. Then we should have the exercise conducted by some one who understands the peculiarities of each individual and knows just what exercises are suited for her in her special physical condition. They should also be directed by one who understands perfectly that the girl with an anæmic brain, that is, with a brain having too little blood, cannot be conducted on the same plan as the exercise of the girl who has a superabundance of blood in the brain.