The invalids on a long list of old associates which Dr. Clarke's book has led me to call to mind and look up, are, I have been surprised to find, among those who did "run well for a time," but they have turned back and ceased mental labor. Some have fallen into worldliness and a fashionable life, and are broken down under it. Others, restricted to some narrow creed of thought, have not dared to open their eyes to the light of any new day that is dawning on the world, until, ceasing to grow, they have, according to a law of nature, fallen into decay, invalidism, and "nervous prostration." Bringing this subject before several experienced persons, teachers, and one a physician, in the light in which I have aimed to bring it before my readers, I have asked, "And were these cases of invalidism (cases of which we have been speaking) from your best scholars? Were they, in short, persons still continuing to grow?" Stopping a moment to think, they have, in two instances at least, given precisely the same answer: "I never thought of that before, but they were not." There are some other things that characterized methods, of study in those academies of forty or fifty years ago, that may instruct us. While the girls studied harder, had more recitations, extending through more hours in a day than are required in any of our High schools, they seldom studied in school, but at their homes or at their boarding places. This gave them freedom of position, liberty to sit or stand or walk, when they were at work on a difficult problem, or engaged in close thinking--an advantage which any one who has been a close student in later life, must appreciate--an advantage which I have recently heard young ladies in our university say, they could hardly conceive of before they went to the university from the high school where they fitted. This also led them almost every hour into the open air, and to take a little exercise, as the girls in our university and in some of our colleges are forced to do, effecting a visible and marked improvement in the standard of health among the girls in the university above that of the girls in the High schools.